-er b-u bbb bbc bbd bbe bbk bbl bbr bbu bcb bcc bcd bce bck bcl bcr bcu bdb bdc bdd bde bdk bdl bdr bdu be- beb bec bed bee bek bel ber beu bkb bkc bke bkk bkl bkr blb blc bld ble blk bll blr blu brb brd bre brk brl brr bru bub buc bud bue buk bul bur buu c-- cbb cbc cbd cbe cbk cbl cbr cbu ccb ccc ccd cce cck ccl ccr ccu cdb cdc cdd cde cdk cdl cdr cdu ce- ceb cec ced cee cek cel cer ceu ckb ckc ckd cl- clb clc cld cle clk cll clr clu crb crc crd cre crk crl crr cru cub cuc cud cue cuk cul cur cuu dbb dbc dbd dbe dbk dbl dbr dbu dcb dcc dcd dce dck dcl dcr dcu ddb ddc ddd dde ddk ddl ddr ddu de- deb dec ded dee dek del der deu dkb dkc dke dkk dkl dkr dku dl- dlb dlc dld dle dlk dll dlr dlu drb drc drd dre drk drl drr dru dub duc dud due duk dul dur ebb ebc ebd ebe ebk ebl ebr ebu ec- ecb ecc ecd ece eck ecl ecr ecu ed- edb edc edd ede edk edl edr edu eeb eec eed eee eek eel eer ekb ekc ekd eke ekl ekr eku elb elc eld ele elk ell elr elu erb erc erd ere erk erl err eru eu- eub euc eud eue eul eur kbb kbc kbd kbe kbk kbl kbr kbu kcb kcc kcd kce kck kcl kcr kcu kdb kdc kde kdk kdl kdr kdu ke- keb kec ked kee kek kel ker kkb kkc kke kkk kkl kkr kku kl- klb klc kld klr klu krc krd krk krl krr kru kub kuc kud kue kuk kul kur kuu lbb lbc lbd lbe lbk lbl lbr lbu lcb lcc lcd lce lck lcl lcr lcu ldb ldc ldd lde ldk ldl ldr ldu leb lec led lee lek lel ler leu lkb lkl lkr llb llc lld lle llk lll llr llu lrb lrc lrd lrk lrr lru lub luc lud lue luk lul lur luu rbb rbc rbd rbe rbk rbl rbr rbu rcb rcc rcd rce rcl rcr rcu rdb rdc rdd rde rdl rdr rdu re- reb rec red ree rek rel rer reu rkb rkc rke rkk rku rlc rld rle rll rlr rlu rrb rrc rrd rrk rrl rrr rru rub ruc rud rue ruk rur ruu ubb ubc ube ubk ubl ubr ubu ucb ucc ucd uce uck ucl ucr ucu udb udc udd ude udk udl udr udu ueb uec ued uee uel uer ukb ukc uke ukk ukl ukr uku ulb ulc uld ule ulk ull ulr ulu ur- urb urc urd ure urk url urr uru uuc uue uur uuu

bbbb bbdd bbeb bblb bbrc bcbc bccc bccl bcde bcec bcer bcru bcuc bd-r bdbc bddc bdle bebb bebe beck becu bede bedl bedu beeb beed beek beel beer beke beld bele belk bell belu berc berd bere berk berr beru beuk beur blcu bldc bldr bleb bled blee blek bleu blkb blkd blrc blub blud blue blur brcb brce breb brec bred bree brek brel brer brkb brrr bruc brud brue bubb bube bubu bucc buce buck bucu budb budd bude budl budu buel buer bueu buke bukk buku bulb buld bule bulk bull bulu bur- burb burd bure burk burl burr buru c-cd cbbc cbcc cbce cbcl cbcr cbcu cbdb cbdc cbec cbee cber cbkl cbkr cblb cblc cbrd cbre cbrl ccbc cccb cccc cccl cccu ccdc ccdr cced ccee ccel cclc ccrc ccre ccrl ccuc cd-e cd-r cddb cddl cddr cdec cder cdre cebu cec- cece cedd cede cedu ceeb ceec ceel ceke cel- celc cele cell cer- cerc cerd cere cerl ckbc ckbe ckck ckcl ckdu cker ckrc ckrd clcd cldc cldr clec cled clee clek cler cleu clrd club clud clue crbc crbu crcc crce crcr crdc cre- creb crec cred cree creu crkc crkl crub crud crue cruk cub- cubb cube cucc cuce cuck cude cued cuek cuer cuk- cuke culb culc culd cule culk cull curb curd cure curl curr dbcc dcbc dccb dccc dccl dccu dcdb dcrk dddd ddlc ddrc ddre ddub debe debu dec- decc decd dece deck decl dedd dede dedu deeb deed deek deel deer dek- deke deld dele delk dell der- derb derc dere derk derr deue deuk deul deur dkdc dlbd drbc dred dree drek drel drub drue druk druu dub- dubb dubc dube dubu duce duck dudd dude dudu duel duer duke duku dulc dule dull dulu dure durk duru duul duur e-cl ebbc ebbr ebcc ebed ebel eber ebru ebul ebur ecbc ecbe eccb eccc ecce eccl ecdc ecdl eced ecrc ecrl ecrr ecru eddc edde ede- edel eder edle edru educ edur eede eedu eeee eeke eele eerc ekeb eked ekek eker ekur el-b elbe elbu elcb elce elde eldr elec eled elee elek eler elke elle ellu elue elul erbb erbe ercc erce erde ereb erec ered erel erer erke erld erle erll errc erre erub eruc erur eubc eucd eude euer eule eur- eurc eure kbbb kbbc kbbd kbbe kbbk kbbl kbbr kbbu kbcb kbce kbck kbcl kbcr kbcu kbdb kbde kbdl kbdr kbeb kbec kbed kbee kbek kbel kber kbkb kbkk kbkl kbkr kblb kbld kble kbll kblr kblu kbrb kbrc kbrd kbre kbrk kbrl kbru kbub kbuc kbud kbue kbuk kbul kbur kbuu kcbc kcbd kcbk kcbl kcbr kcbu kccb kccc kccd kcck kccl kccr kccu kcdc kcdd kcdr kcdu kceb kcec kced kcee kcel kceu kckc kckk kckl kckr kclc kcle kclk kcll kclr kclu kcrc kcrr kcru kcub kcue kcuk kcul kdbb kdbl kdbr kdcc kdcd kdce kdcr kddb kddc kddd kddk kddl kddr kdeb kdec kdel kdkb kdkd kdkk kdkr kdlb kdlc kdld kdll kdlr kdrb kdrl kdub kduc kdur kebb kebc kebe kebr kebu keck