bbbb bbdd bbeb bbfc bblb bbrc bcbc bccc bccl bcde bcec bcer bcfc bd-r bdbc bddc bdle bebb bebe beck bede bedl beeb beed beef beek beel beer befe beff beke beld bele belk bell berc berd bere berk berr bffl bldc bldr bleb bled blee blek blfc blkb blkd blrc brcb brce breb brec bred bree bref brek brel brer brfc brkb brrr c-cd cbbc cbcc cbce cbcl cbcr cbdb cbdc cbec cbee cbef cber cbfb cbfc cbkl cbkr cblb cblc cbrd cbre cbrl ccbc cccb cccc cccf cccl ccdc ccdf ccdr cced ccee ccel ccfc ccfd ccff ccfl cclc ccrc ccre ccrf ccrl cd-e cd-r cdbf cddb cddl cddr cdec cdef cder cdfe cdre cec- cece cedd cede ceeb ceec ceel cef- cefc ceke cel- celc cele celf cell cer- cerc cerd cere cerf cerl cfbc cfbr cfcb cfcf cfcl cffb cffr cfrb cfre ckbc ckbe ckck ckcl cker ckfr cklf ckrc ckrd clcd cldc cldr clec cled clee clef clek cler clrd crbc crcc crce crcr crdc cre- creb crec cred cree crfc crfl crkc crkl crlf dbcc dbfc dcbc dccb dccc dccl dcdb dcfc dcrk dddd ddlc ddrc ddre debe dec- decc decd dece deck decl dedd dede deeb deed deef deek deel deer defe deff dek- deke deld dele delf delk dell der- derb derc dere derf derk derr dfcc dfer dfrf dkdc dlbd drbc dred dree dref drek drel drfc e-cl ebbc ebbr ebcc ebed ebel eber ebfc ecbc ecbe eccb eccc ecce eccl ecdc ecdf ecdl eced ecef ecfc ecfr ecrc ecrf ecrl ecrr eddc edde ede- edel eder edfl edle eede eeee eefe eefl eeke eele eerc efbr efke ekeb eked ekek eker ekfc el-b elbe elcb elce elde eldr elec eled elee elef elek eler elfc elfe elke elle erbb erbe ercc erce erde erdf ereb erec ered erel erer erfc erke erld erle erll errc erre f--k fble fccf fdlr fece feck fede feeb feed feek feel feer fefc fefe feff feke feld fele felf felk fell ferb ferc ferd fere ferk ferr ffcc ffee ffff ffrr flcl fldr fled flee fler frbc frcc fred free frfc kbbb kbbc kbbd kbbe kbbf kbbk kbbl kbbr kbcb kbce kbck kbcl kbcr kbdb kbde kbdf kbdl kbdr kbeb kbec kbed kbee kbef kbek kbel kber kbfb kbfc kbff kbfk kbfl kbfr kbkb kbkf kbkk kbkl kbkr kblb kbld kble kblf kbll kblr kbrb kbrc kbrd kbre kbrf kbrk kbrl kcbc kcbd kcbf kcbk kcbl kcbr kccb kccc kccd kcck kccl kccr kcdc kcdd kcdr kceb kcec kced kcee kcel kcfb kcfc kcfd kcfl kckc kckf kckk kckl kckr kclc kcle kclf kclk kcll kclr kcrc kcrr kdbb kdbl kdbr kdcc kdcd kdce kdcr kddb kddc kddd kddf kddk kddl kddr kdeb kdec kdef kdel kdfc kdfr kdkb kdkd kdkk kdkr kdlb kdlc kdld kdlf kdll kdlr kdrb kdrf kdrl kebb kebc kebe kebr keck kecr kedb kedc kedd kede kedr keed keef keek keel keer kefb kefc keff kefr kekb kekc keke kekl keld kele kelf kelk kell ker- kerb kerc kere kerf kerk kerl kerr kfbc kfbk kfcd kfcf kfcr kfeb kfed kfel kfer kffb kfff kffk kfkb kflb kflc kfld kflf kfll kfrc kfrd kfre kfrr kkbb kkbd kkbe kkbl kkbr kkcb kkcd kkck kkcl kkcr kkdc kkdd kkdl kked kkfr kkkk kklb kklc kkld kklf kkll kkrb kkrc kkre kkrf kkrk kkrl kkrr klbb klbc klbd klbe klbf klbl klcb klcc klcd klce klck klcl klcr kldc kldd klde kldr kleb klec kled klee klef klek kler klfc klfd klfe klff klkc klkk klkl klkr kllb kllc klle kllk klrc klrd klrf klrk klrr krbb krbd krbe krbk krbl krbr krcb krcc krcd krce krcl krdc krdd krde krdr kreb krec kred kree kref krek krfc krfd krfe krff krkc krkd krke krkk krkr krlc krld krle krlf krrb krrc krre krrf krrk krrl krrr lbcc lblr lcbc lccc lcce lcdd lcdr lcer lcfc lcfr lcrd lcrl ldcf lebd lece leck lede leed leef leek leel leer lefe leff leke lekk lele lell lerc lerd lere lerk lfcc lfrd llcc lldb lldc llef lllc llll lrdd lrfc lrrc lrrr rbbb rbbr rbcl rble rcbc rccb rccc rcdc rcde rcfc rcle rcrd rder rebb rebe rebk recc recd rece reck recr redc redd rede redl redr reeb reed reef reek reel refd refe reff refl refr reke relb reld rele rell rerd rere rfef rffc rffl rkkf rlee rlef rred rrfc rrle rrrr