An Adaptive elearning framework- Design Issues and Considerations

Transcription

1 The ITB Journal Volume 5 Issue 1 Article An Adaptive elearning framework- Design Issues and Considerations Maria Brennan Institute of Technology Blanchardstown, maria.brennan@itb.ie Follow this and additional works at: Part of the Education Commons Recommended Citation Brennan, Maria (2004) "An Adaptive elearning framework- Design Issues and Considerations," The ITB Journal: Vol. 5: Iss. 1, Article 4. doi: /d77f17 Available at: This Article is brought to you for free and open access by the Journals Published Through Arrow at ARROW@DIT. It has been accepted for inclusion in The ITB Journal by an authorized administrator of ARROW@DIT. For more information, please contact yvonne.desmond@dit.ie, arrow.admin@dit.ie, brian.widdis@dit.ie.

2 AF A A A A BA F A B F BAA F F E E E A ABA B D EA D D C F F E E BDCED C F C C BBCB D D E AE E A A D E D D D BA E A D E B E A B BA E D B AB E D E A B A A E E E E E B E A EE E EA B A D D BA EE A E A D A E A E ABA E D EA A B D E D E A EA B EAA E B E A E E D B E A E A D B B E B D D EA F E D D E D D B B E B A E E D E D A D E E E D D EA E E E B E E D E B E EA B D EA BB EA B E BBB D E D E A E A E E B D E D EA B EA DA EE AD B A E D EB A B E BD E D A A E D E A EA A E E A F E B E E D E B E BDB A B B F E D D D BA E A D E B E E A E E E A A AC D D F C B B D F F C B B BE C B B A DCBE A ECD B E A D E C B B ECB A E A C D E BBED BD B D CBA F C B B BD B D BC F A F C B B F BD BC B B C D ACB D CB BE B EE BE B FCBA C F CB B D D D B C CA D A C B B E C B D FF F BB D FF F B CBA D F B B D D D E B F CD A F F E FFA E D C A D C B B D C A CB E CF A C F ECD B CBA E CBA C BF C CB D D D E BD D CD C BD A E A D C B B BEF BD A D C B B C CD D C DCBAC A D CFF FF B CD B BD A D DB CA B ACD D CD B D D C E C A A DE C F DCD BC B C DCBAC A D CFF B C DCBAC A D C ED C CE D CE D D B C F C FF CDD D DA D A ABD B C F D B B D CB CAC D D D C B B C AB CDE F F

3 C C F C B B D F BD A E A CBA A BD F C B B D FFF BEA B CDD D FFCA D A BD CBA A B D CDD D CF D F C B B D F FF A B A F F B CD BDCD BCD D D C D E FC F C B B D F CBA D DC F D D D F C BDE CB D CE B E D CD D F C B F C BCD B F BE DD F C B D BA A CF F C B B D F CBA CB B F B E A B A A F A CBA A FA A BA B D CDA AE D C BFB CBE D E A B FCB C D FA A C A F A CBA AC B CD B EC D D F B D B DBE D CD A ECD BCF B D D D B C E E BDF C B BD C BEEE CF BD CBA C FD D A BA A CF C A D F B D D BD B DB B BD E BBE D D BA B BF B E B ECD B CB D C A DD E B F A CD A F C B B CD D A ECD B F F F C B BDF D B D D D C B B E CFF B D BD B D E BC E CD A F C B B A ECD B D CD B CBE A A FA C D BD B DC B BCB B ECD D C B B A C D BD E F CBA B D C CF BD D DCBAC A D CE B D AAC D BE CC E D F D B D CD ECB A D D CB CB CD B ECD E B ECD B CBA C D B D D E B ECF A E BDCD B D C B CD B BE CBA A CF C B B ECB F C B D C F D D D B E CB BD CB CA CBDC DC B D B B F A E CBA CE C B DB C CEEF E DA F C B E BD ECD F C B BD ECB B CBE D CA D BCF D CE B D A CBA CD CFE C EFC A EB D D CBA B B BD B D E D C A D C B B C B B A D CAA A CA CBDC D A BD B D CD D ECB A F BF B E B D A B D CF D CBA C B B CD B C A EB CBA FF D B C A CEECB AA CE CBA A ED B D F C BCB B CBA CE F DCD D A EB C B B ECB A B A CBA C A CBA A D E B F ECB BD CD CF B C D FCD B C B D CED F B C F C B B B C F DDF D C D F C B B D F ECB F CB BA A CF B A D B B BF B F C B B BD CED B CBA A F D AA B BF B EFCC A C CD ECFF A BD D CA D BCF EFC BA DCBA B B F C BC A C D D A E B C BE AB CDE F FA

4 D A BCBD F C B B D F C CF C A DCBA DCED F B D D E B A B D F F C B CA B CF D B B C A D B CF C B C A D B CED F B D D E D D B D F D C C D F C B B F D FC D D C CED D F C B B ED BA D C BED B D D F C B B CBA F FB F BD B D F C B B F D B F C B D C E BCD B D C A E A C C F A B B BD C CED DD A BD D BF CD D B A CBA D A CD D B CE D A BD B CD BBD CB CAA D B D B F A CBA CA BD D ED D D F C B BE ECB E CBD D CBA CD D C D A B D CF B DE BC DF D D C B A D A F BD CE CBA D D CD F CE D A BD DF ED B A BD CBA A F D B CD B B A C FF A B CD B BD D CEBA A DCBE A ECD B C FF C D B D E B F D D C B B D FF CF F CD C DC F CAC D C E D ED D EA D E BD D B D D A FA DCBE F C B B B CB CB A CBB C BB F CB C DCD B DDC F B D D A DCBE F C B B B D B BB DCDA D DCDD C D D E B F D AC C F D E B ECD D D A D D A D A BD B D CB BD C A DDD B B DD C FCD D E D B B D C BCFF D D A D A DCAEC D E CCBA CA B C DB D D CAEC D B CD B CBA FCD E DA CD A E B ECD B EC C DCF B A BD B A DCBE A FBACA CD DC D C DCBE A ECD B C CF A D CBD F B CE BC B B C E D C B B DCBE A ECD B A C D BD CD E FFCBA B DC BD AB CDE F

5 A ECA CAAB E CFF B E CD B CBA A B B F C B B E D A D A BD D A B B D B CBD E BE B E BDF CE BC B B C C A D CD F D E CD B BD CED D CBA D B E B D C B F C B DE B D CFC E BD D D CD D F ED D E B FB D CE B D F F C B B D FCADC B A CBA E CD CED B C B D C C CBA E A A D CED F C B B D F C C F B C F D F E B BE A DCBE A ECD B EFCD A BD B D A DCBE F C B B EFCA C BA BA BD CBA E BE D CF F C B B D F CA DC C E B CFF D D A BD CE BD C C F D D F D E B D A BD CE BD B D A DCBE F C B B E CA C E CF CBA E BE D CF F C B B D F D A BD D D C E CF CBA C F A F C B B D FA E DD B D B ECEFCDE D D A D A D CD EEF A DCBE A ECD B D A BD C A CB BA BA BD F C B B B B BD F EEF B EC D A BD A C BE B D D D A BD D A CD C A DCBE C C CD A D DD D CBA D D ECB C C D E FC F CBACFF D D C CD BBD CF A E FD E CF BD CED B E C DC B A C A E EE CBA C F CBA B CF E CF D C CFF D C E DC B D BD B D A DCBE F C B B B B BD D A BD C D F FCD A DC D D F D CD B BE D CD B CBCBA C DDB FE D B B A B BD CBA CD CF A DCBE A F F EDE B A B D BF F C B B DE D CF E BD BDBD CBA D E B ECF E B D C BD F D E B A A C D B A E C CED D E CBA BA A CF A BE D D D A BD CBA D D CE DC D A DCBE A ECD D A F C E C F B CBA CDE B D E B E CD B CBA C BDC B B C D FCD B B B BD CBA B D B DA BD D E B ECD D CE D CBA D D D CE B DC B CFC C AB CDE F

6 CBA CDE D E B CBA C C D CE B B B BD D FCD B C D A BD C A A C D B D D CE CE D A BD EFF CEE A B D C D E FC E E D FF C B B DC B D F BEA DCBE A ECD BD D A BD DDDC B E CFD D CE D D C CFCBED C D F F C B B A EB D D A BD F C B B D F CBA A B B CBA BD B B CD B D DB D CD C D E FC CBBFF C E B A C F B D DE F EAEDE E B FC A C B B C E D C A D C B B D A F D CD BEF A C A BD CB D C A CBAC A D C B B B CB D E E BD BD A B A CBA A F A D D C B D ED BCFEDC EFC C A F C B BC E CD CF BD CFF D C B FCF E E BD BD BD A F D CD ECB C E A CBA D B E F D A B CD C BD DED B C FF BD CB BD CFF C B E D BEE FC B B ED CF C C F F D F B A D B C FF BE D CE B D A BD ECB E F ECB C E A F F D CBA BA D F B D B A D D CA B D C BB E C E BD BD B DBEF A B CBED BD B CD A FB E BD BD CED D D BD B D FFB DC D CBAFCD B F CF D A BD D CED CF E BC F A BD DC B DC D C F D D E D D F C B B CD CF D D A BD B B AD E BD F D F C B BEF CA D C C D F C B B EE C A D B D ED F A F C B B C D E B FF C BD A D DC B D F C B B A D B E D E B A D E B A F E BD BD B CFF B D ECFF A F C B B ED E BD D D D C B D CBA C C FC D B F C B B ED BD CED D CEE ACD A BD F C B B D F CBA D F C B B D C A CF CBA D D B C B CD B CEB D F E B D C B A CB B D ED F A EFC D CD D C D D F ECB F C B CD EDC F CE DBE C BFF D BD B F FD A BD ECB BC CD D D F C B B D ED E B CD A B E CF B F D D E E F C B B B A CFFD A BD D F ED F C B B CD CF DA ED A D E BD BD D CD D DF FB F A BD D CBA CD D B A D B D ED F B D C D E FC CED D B CF CD B D D DCBD E B A CD B C E BD BD CBA A B A D C B B C F BC C BD DB A D D C B BD CAA C BD ECB A DC F A E B B F C B E C CED D E D F C B B B B BD CBA C C D D B FD DCBDBD B F D AB CDE F F

7 A BD ECD B D DCBAC A C F D C B A D A BD D CDD ED F A D CE DCBAC AFA FA C E E B F C B B ED F C B B ED A B CD D D C B B A D B CBAD D C B B A D C F D CD B F A F E B D ED A A E D C BDB CD B D F C B D C B D DC B A B D C B B D D F D F F FCEE F DE DC B E C CED D ED D D B CD B D CB A B C A DC F A BD CF C B D D D A D A D CDD A E B DC CBADC E BA E B DC CBADC B CD B D B CB C E D ED D CD D D BD B CBA D E D CBD D F B D E B FC A D C B B CFF BA A CF A BE B F C B B D F BD CED D CEE ACD A BD F C B B D F CBA D D D CBA A F BD F C B B D C A CF D D B CBAC B F C BA CD D C F C B B CF A C F F FCD B D CD ECB DC F A D D F C B F F E BE F ECB F C B CD C CE D CD D D CBA E CD CF C D B C BE D ECB E D D F C B B CD CF D D B B A D A BD C E BD F D F C B BE CBA ECB DD BA DCBA D CD CF F CA B D C C D F C B B E E C A D D CD CB B D ED F A E E B FC A D C B BE CB B D C ECD B CBA BA A CF DC B FF B CF D B F BD D B E B D CFFD C B B A BCD A D C D BDE CBC BD CF E DE CBABCF A F BD D C B B C BE C B CD C C A CD AB CDE F

8 DCD D E D DE F E B E B A B CDD B D C C C B B D AC D CD D E B A B B F A FF CBA C F D CBA CD D BA A CF CECA E CBABCF CEBAD BA A CF EDC F D DA CD BA A CF A A D F F C B B D E BD BD C CD CBAD DC F D BA A CF F C B B D F CE F C BFD EFC A C CD F CBA CD B CE D DCBD D CD D D D A B D DA B CFF B BD D A B E BD B B D D E CB C B BD F D CD FC D C B B BA D D ACC AD CD C B BCD BCF DCD D ED C E BD D B D B EF A ECD B B D A DCD BA D CD B D D D B C B AD CD D CD CB E BD A DCBE F C B C B CB FC D C E CB FC D CBA D CD C B D A D CD BEF A A FCE CBC BD FCE D CD B F D D E B FFCE D A BD D B C C D CD CF C C D C E BD D A CDF D D A DBA A CF F C B B BE CBAF A B A EA BD D A BD BE B B CD B A FC A D DC F D DE C A B A CBA BD A D D D D D A BD D B F FCD A D E CBA FCE D D CD B D E BD B D DF B C BDB CD B D CD D D C F B A D D CA CBDC B D C B B FF DD B CD CBD B CBD D CBACBD D CE BA A CF F C B A BDF BA A CFA ED B CBA ACBE C D C B D CE D CB D C A C C F D E D C A F C B B C D CD B CD B A FC A BF B C CF D CBA C B D D D A BA B A BD BA A CFED B CD B D CD A FC A B BD D F D B D D F D CE D D D A B A CBA F BCD E B D D D ED CB E D BD CE A ECD BCF C FCE A B A F B A B A ECD BCF D CD BD D F D CD FA C B AF ED B C E FF B B BD D D A BDCBA A D F ED B D C FF C F D B B C D F ED FC B D B CB C B B BF B B B BD DECB B CBA A B D D BD D D D A BDD F D D A B CBA B CD B D C A D D D A BD D B CF F D B D CAC D D DBA C DDF D B D CAC D D D DD D F C B B D FD BA A CF AB CDE F

9 D D A C F D CDDD A B D D A D A FC D B CD B D D D A BD D B F D B D D F B A D B B D F C B B D F D BA A CF DC B D E CBA BA DCBA D A FC D A D CD D D D C B B F A D D A ECB D B CFF D CAC DCD B D DCBAC A D B BFA B D BF B E E BD BD CBC BD D B B D CD FF A DC D E FC ED FF B D DFF A D B B D F C B B D FC CB D BBCD CD ECB A D B BA A CF F C B B D FC CB A BD D F F C B B CBA D FF D A A B A DC F D A E CD A C E BD BD FA D D D B D D D B D CAC D D D CE D D F CBA BD D B B CD B B C C D C D D FF D CE B D D D D CAC D C E D ED D CD FF FA D CAC D C C B B D F DBD BD AC D C B B B B BD A CD A E D ED FF D CBCFA F F BD CBA CF CD CB CAC D C B B B B BD B E B DC A ED FF E CBC BD D D CD BC F D E BD A F CF D BF B A ECD B F CD CF FF BD A D D D A BD D D CAC D DBD B A C CD CF D CD FF BD A D D FF BEF A B BD F ED BD BD A F C A C E BD BD D AB CDE F

10 C FF D B CAC D A DD DF C B B D F EDE C CFF A BD CBA D CD C F D F C B B CD B C FF C E CBA D CD D D C ECD F C B C D F C B D BCF C CBA D DD B C A DC F C B B D FA D B AC F C B DD FBC D E BA B ACDC BA DD D CD D C CF F C BBA DD D CD D C C C A D F C BC CFF CA CD BDD B ACDC D CD D CBA C C B B C CFCBE A F C B CFCBE A F C B FF E B C ED CD DA CD B D D CF CBA C A D F C B B D F A E D B E B FB DCD DCBA D C CD D D B CE A D B B CD B D C D F CFF CE B DA BCBD F C B B D F BA C B D A A C D F C B B D FF C B A BD A E C B D D E D F C B B D F D CD FB F C B BA B B CE FD D DF D BA D CB D D B D C F A F A D BA ECD F CB B D BD D CD C C B D D B D A DE CB BA A CF B B BD D B B CBA FEE A B A ECA D CBB D BA A D CBA F CBA D FD B F C B E FCD A D EC BE CBA C D D ACBC BD D F F C B B D F CBA C C CF D BA BE BA ECD C A B E F D C F B D E F ECF D BA ECD DD D C ED CBD C CBA CDD D A C B BEF A B C CE D F C B BBC A CD B CED CBA BD D F C B C A CD C B B E BE DBC EC F D C F BD D F C B C E D CEC F B B DB CD B D CECBA F ED ECB BD B CD B D DF C BB C C D CD D FA BA DCBA C F D C F D EA A E D F C B B D F D CD D D CE BA A CFBE CD B C A D C B B D CD C CF D D BA F C BCB BEF A B A DC FFF FC A D E A C F CED CBA CED ECF C F ECD BD B CD B B BD A AB CDE F

11 FCD B CBA D D B D DFD FAC FC CF B D D BA F C B F ECD B D E DE F CD B C C FDCED ECF C F ECD B D B CD B B BD A FA C C A D C B B BD D D D BA F C B D F C B FAC F DD A E CD A EB CBA A CF ACDC CBEF A A B DC A D C B B BD CED B D CD CF D CE FA C F CF F BCF CF DCD BCD C A D C B B FFC F C D C CF B D D BA F C B BD B F ECF CBD CBAC E FD C E CD A D D B CD CF B BD A F F DD D BA C A D C B B D BA F C B B D B CD B C ED F FF C D BD D B D D BA F C B EE C E CD D CD F D DB D F C B CBA D D CF D CE BA D BCFF D D B CD B C F C A D C B B A B A D BB B D BA CE A DFA C F D C CF B D D BA F C B B DBA D CF B D D D CF CF C F C A D C B B D CD BEF A FCD B CBA D D B D DFD FAC F DED D D BA F C BC BA D D CB B BA A F C B B C BACB F C EB D BA ECDB B CF D CD D C DE FF D A BD A B D CFF A F A BA BA BD C D CED D B B F C B B D F AB CDE F

12 BD D CBA BC E BD A B D FA F ED CBA BD CBA B D B D F CD BA CC C C BE CDC D E FC F D D A BD CDD BA B FC CB B D CBA FF DCFF F CF C D E FF CE F B D E B F B A D BA DCBA D F C B B D F D D A BDB A B B E CED D BA D B D E B FB E E B D CD B D D A BD FF C F B D D D DE E BF B A ECD BCF D ECB A D AA BC ECFF CAC D B F C B B E BD BD D D B F A F F CBA CAC D B BDCD B E BD BD D D E D B BE D F C B BE D BE C B A D B A D DC D B BD B D C B CD B B C C DA BD CD D F B CB A ECD BCF E BD BD B D E D C F D CD C D A BD CF CBA C A C C C A FC A B BD D CDCA ACF C F B CD B D CD FA C B B D CFF BD A D B D D CF CBB A C D B FA D A B D D E BD BD BD A B C C D CD B CD B A BCBDF E BD A D C A C E DC B F C B B D F CBA CF C F B CD B B B CAA A D DD CD CF C F B CD B B D F D B D E A FC C F C B B D F CBA D D A E BA B BDCD B D F DBCBA ED F C B D C B D E BD BD D CD CF D C CAC D A D CD D ECB BA DCBA D DD C B DDC F CF C A D F C B B D FBED CD D B CD B BD A D D FA CD C A C C CD E BDCD BB CD B D F C A E BD BD BEF A CF C BDED A C C CBA F C A D C B BA CBA A ED F C B D BA D DC B CBA BA DCBA B CD B D A B D B CED D D A E BC F B D FC B B D D D CF D BA D F D CB F ED F C B FA D B B D E CBE DB A EB CBA AA CE DB CB D E D FF C DBE B C F D FA CF BE C A DB C E CD D A EC D E D DD A BD F ED F C B CF BCB C ACBE AB CDE F

13 F C B FA B E CF B CD B BD A D DF C B FA B F A C C CBA D D CBA C B BD D CD B F C E D E FF E C DC D B C BD CF CBB BD CF F C BC C A E FD FF B CBAB B CD B B D E D CB D BD B CD B D C BD CF F C B D B D CB E C D FF B D D D F D D FF DB DFBD B D D BE B D C D A B D B A D DC D D D DF B D F EDCD CFDFB F ECF AB D F B B A B FF C D D BA ED F C B F C B C A CD CF BE E EC D C F CD B BDCFFD BECF C F CBA D B B B BE F CBA D B BE BA ED F C B FD EDB D BDCD B B CD B ECB C ADB C FD ED A CBBD CFF D D F D B D BF D CD D A C F D D F C D A ED F C B B D B CF BE F CBA D A A E E BBE CBA C F ECD BBE A A ED B D BA DE BE CBA A F D CB BA ED B D A BD CF D ED A BDCD B C F F D C A A ED C CE C E D CD DD C CE D A ECD B BA ED B D A F C B B CBA F B D BD BB CD B D D CD D E FFE BE B D ED B EFF A A ED C F EC A A ED BDCD B C CD C CBA E BD F CBA CFF C A E C CD CF DC A ED D CD FF A D BA DC D ED FFCBA CE A C B CE A C E E BD BD FF E CD A B D C F C BD B B BD CBA C D CD ECFF E B D D BD E A C BE D FC E BD BD F CA A D A F D D D A BD CE D A BD F C B B D FD A D B AA D B DF C B B D F CD BBC FC D D CD D BA ECD D FF A D CFF D A BD BBC FFB D CD C BA D B D CD D D A BD FF ED A D CB DC B D BF B E BBC FFCA C C FC F BF B D D A BD B D F B D D E AB CDE F A

14 D AEDEEDE DE E D E D F B FFB DFF B CD D A D D B FA B CD B DD D A B B CD D B F E A B A CD FCE D D A B A D D B FA B CCBA B D CF C C D CFF BD CF D E C A E FD D CA DE D F D D D B FA B DC D C EDCA B D A ED B D B A B CBA D B D A DF C C A E FD D B D D B D ED B AB CDE F EDE E DE E D E B E D B BD D BE D E BD BD D CED CF B D C A D CF BDCD B CF BA ED CB CD B A A ED BA ED CB CD B A A ED ED E B F ED ED A BD C D E CD B C BD CF BA DCBA B F CF BD CF ED F CF

15 E BD B C ACF D BA ECD D B D B D CD C C D E BA ECD D DE BD D AB CD B BDCE BA D E BA ECD DACF DE D D C D B D C F C E B D CF ACF D BA ECD C D B CF F C B CBA E C F C B FA B D D D F D E C DCDEDE BA D E C A DD B D F C B FA B D C A DC CBA F EDC FF D F BD DF C B B D E BA D E B D D E DCED F D B DC B B D CBA D B EFC B DFF B E B CD B BE D C D F C B A D B A D B D E BD BD D CD CF ECB CAC D A B C C D CD D D D BA A CF D F CBA B C C D CD FFBD D A B D CD CF A C D CAC D D D D CE F C B B D F C FC D A BD CCF D F C B D B CD B ECB BD A D DB C C ECF CD A C C CBA E C D D D A B CBA D CE D CD FF A BCBDF B F CAC D B D B CD B B D ECA CFF D CAC D D BD CE CBA E BDC B C A F C E B B A A CDB CD B D CD BD A D D D A BD D B F D F D D D CE D A BD FF D B A D D C CFD D E CB B B CD B BDCD B ACCE A D E CC A E AA DCBE F C B B C E CB BD CF C DA ECD B D D ACD C CF A EA D CD DC E DC BF D CDD B D C C A ECD B F C B F C B B CD A DCBE E BD D B D CD DBD A ECD B C B CBA C CEE D A D CFD D D CB C A D CD D B D A ECD B B DCBD C B D CD CB A E A D C C A F C B B D FCB F C B B D F C B EA CBA B CD B ECB CAC D A DD D DE D BD A D B D F C B A D F CBA BD B CD B D DB CB C CDC B B D FFF A EA B C D BBC A B A E ECFF D A D B C F C B B D F BD A D D F C B ECB D B CFD A C B A A DD D C D E B ECD D C F D DD D F CBA CB B C D ED D A F D B C D BF BDA DCBE A ECD B B E B D D A B D D A BD D C CAC DC FD E FA B CF C F D D A ECD B DCBA AB CDE F

16 CF D ED D B D C B B CBA A DCBE A ECD B CBA D A D B DF CBE D B D A B D D CBA D B ECBDF EEF DE BD B A BD D A B C A B D F C B B D F CED D A D CD D A BD ECD B CBA F C B B D F CBA F C B B D CD E B A D CAC D D ECB F CE F DCD D CE BD DCFA DCBE A ECD B CBA C B B CF D BEF A C FD CB C C A D CD A B D D CA D A CEE A B D D A BD B AA BD A D AD D CD E A BE BD C BA E CFF B B D ED BCF A B CBA D A D CD D C E D CD DCF DF C B B CD CFB CBE A D CD CF A B A D DC BD CEE BD F C B BA A CF F C B B D F E DA C CB C CB B CD B CBA E B ECD B D E B F B CBE DCF D B CBA A DCBE F C B B ECD E A AD E A E A D E F E D DEEB CD B C CBA BA A CF A F C B B CD E A B ABA CA E A C CBA F C B B D FCB CBE B F BE A A B A BE DD D E E C CA C CD CBA B CA D B F E B D BD CD B D CE B D F CBA F C B B D FD B D ED BCF D E B F FF CE B B DCBE C B B F E E A B A B A CD E A B B A E A E E BDD FF CBE E F DCBA D DE BA A D B BD C E B C E AA BA E BD E CFF B F A F D E B CE FD CE B ED A BD CF CD B CBA B FDCBDA B A CD E A E BF B F C B A D A A A E B CD D CD C B B D F A DCBD A ECD C F B A E CD E DBD CF BA ECD BD AB CDE F F