-er b-u bbb bbc bbe bbk bbl bbr bbu bcb bcc bce bck bcl bcr bcu be- beb bec bee bek bel ber beu bkb bkc bke bkk bkl bkr blb blc ble blk bll blr blu brb bre brk brl brr bru bub buc bue buk bul bur buu c-- cbb cbc cbe cbk cbl cbr cbu ccb ccc cce cck ccl ccr ccu ce- ceb cec cee cek cel cer ceu ckb ckc cl- clb clc cle clk cll clr clu crb crc cre crk crl crr cru cub cuc cue cuk cul cur cuu ebb ebc ebe ebk ebl ebr ebu ec- ecb ecc ece eck ecl ecr ecu eeb eec eee eek eel eer ekb ekc eke ekl ekr eku elb elc ele elk ell elr elu erb erc ere erk erl err eru eu- eub euc eue eul eur kbb kbc kbe kbk kbl kbr kbu kcb kcc kce kck kcl kcr kcu ke- keb kec kee kek kel ker kkb kkc kke kkk kkl kkr kku kl- klb klc klr klu krc krk krl krr kru kub kuc kue kuk kul kur kuu lbb lbc lbe lbk lbl lbr lbu lcb lcc lce lck lcl lcr lcu leb lec lee lek lel ler leu lkb lkl lkr llb llc lle llk lll llr llu lrb lrc lrk lrr lru lub luc lue luk lul lur luu rbb rbc rbe rbk rbl rbr rbu rcb rcc rce rcl rcr rcu re- reb rec ree rek rel rer reu rkb rkc rke rkk rku rlc rle rll rlr rlu rrb rrc rrk rrl rrr rru rub ruc rue ruk rur ruu ubb ubc ube ubk ubl ubr ubu ucb ucc uce uck ucl ucr ucu ueb uec uee uel uer ukb ukc uke ukk ukl ukr uku ulb ulc ule ulk ull ulr ulu ur- urb urc ure urk url urr uru uuc uue uur uuu

bbbb bbeb bblb bbrc bcbc bccc bccl bcec bcer bcru bcuc bebb bebe beck becu beeb beek beel beer beke bele belk bell belu berc bere berk berr beru beuk beur blcu bleb blee blek bleu blkb blrc blub blue blur brcb brce breb brec bree brek brel brer brkb brrr bruc brue bubb bube bubu bucc buce buck bucu buel buer bueu buke bukk buku bulb bule bulk bull bulu bur- burb bure burk burl burr buru cbbc cbcc cbce cbcl cbcr cbcu cbec cbee cber cbkl cbkr cblb cblc cbre cbrl ccbc cccb cccc cccl cccu ccee ccel cclc ccrc ccre ccrl ccuc cebu cec- cece ceeb ceec ceel ceke cel- celc cele cell cer- cerc cere cerl ckbc ckbe ckck ckcl cker ckrc clec clee clek cler cleu club clue crbc crbu crcc crce crcr cre- creb crec cree creu crkc crkl crub crue cruk cub- cubb cube cucc cuce cuck cuek cuer cuk- cuke culb culc cule culk cull curb cure curl curr e-cl ebbc ebbr ebcc ebel eber ebru ebul ebur ecbc ecbe eccb eccc ecce eccl ecrc ecrl ecrr ecru eeee eeke eele eerc ekeb ekek eker ekur el-b elbe elbu elcb elce elec elee elek eler elke elle ellu elue elul erbb erbe ercc erce ereb erec erel erer erke erle erll errc erre erub eruc erur eubc euer eule eur- eurc eure kbbb kbbc kbbe kbbk kbbl kbbr kbbu kbcb kbce kbck kbcl kbcr kbcu kbeb kbec kbee kbek kbel kber kbkb kbkk kbkl kbkr kblb kble kbll kblr kblu kbrb kbrc kbre kbrk kbrl kbru kbub kbuc kbue kbuk kbul kbur kbuu kcbc kcbk kcbl kcbr kcbu kccb kccc kcck kccl kccr kccu kceb kcec kcee kcel kceu kckc kckk kckl kckr kclc kcle kclk kcll kclr kclu kcrc kcrr kcru kcub kcue kcuk kcul kebb kebc kebe kebr kebu keck kecr keek keel keer kekb kekc keke kekl keku kele kelk kell kelu ker- kerb kerc kere kerk kerl kerr keru keul keur kkbb kkbe kkbl kkbr kkcb kkck kkcl kkcr kkkk kklb kklc kkll kkrb kkrc kkre kkrk kkrl kkrr kkuu klbb klbc klbe klbl klbu klcb klcc klce klck klcl klcr kleb klec klee klek kler klkc klkk klkl klkr kllb kllc klle kllk klrc klrk klrr klru klub klue kluk klur kluu krbb krbe krbk krbl krbr krcb krcc krce krcl krcu kreb krec kree krek kreu krkc krke krkk krkr krku krlc krle krrb krrc krre krrk krrl krrr kruc krue kruk krul krur kubb kubc kube kubr kubu kucb kucc kuce kucr kuek kuel kueu kuke kukk kukl kuku kulb kule kull kulu kurb kure kurk kurl kurr kuru kuub kuuk kuul kuur kuuu lbcc lblr lcbc lccc lcce lcer lcrl le-u lebu lece leck leek leel leer leke lekk lele lell lelu lerc lere lerk leuc leuk leur llcc lleu lllc llll lrrc lrrr lube luce luck luer luke lule lull lulu lure lurk luuk rbbb rbbr rbcl rble rcbc rccb rccc rcle rebb rebe rebk rebu recc rece reck recr recu reeb reek reel reke relb rele rell rere reru reue reuk reul reuu rlee rleu rrle rrrr rubb rube rubu ruce ruck ruel ruer ruke rukk ruku rule rulk rull rurc rure ruru ubbe ubek uber uble ucbc ucel ucrc uele uell ukcc ukek ukeu ukrc ukur ulbc ulcc uleb ulee ulek ulle ullr uluk ulul urbe ure- urke urle urre uruk urur uulu uuuu

b-r-k bbbee bcell be-er bebek bebel beber becel becke becue beebe beeke beele beker bekke belce belec belee belek bellb belle belue belur berbe berck bercu berec berek berel berk- berke berle berre berru beuer beule beure bleck bleek bleer bleke blekk blere bleue bluer bluke blurb blure blurr brebu brece breck breek breel breer breke brell brere breu- brrrr bruce bruck bruer bruke brule brull bubbe buber buble bucek bucku bucur buell buker bukk- bulb- bulck bulke bull- bulle bulul burck burcu burek burel burke burle burru buruc buruk cblue ccccc ccell ccrcl ccrel cebec ceber ceele ceere celeb celer cell- celle cerbu cerc- cerce cerec