-er b-u bbb bbc bbe bbk bbl bbr bbt bbu bcb bcc bce bck bcl bcr bct bcu be- beb bec bee bek bel ber bet beu bkb bkc bke bkk bkl bkr bkt blb blc ble blk bll blr blt blu brb bre brk brl brr brt bru btb btc bte btk btl btr btt btu bub buc bue buk bul bur but buu c-- cbb cbc cbe cbk cbl cbr cbt cbu ccb ccc cce cck ccl ccr cct ccu ce- ceb cec cee cek cel cer cet ceu ckb ckc ckt cl- clb clc cle clk cll clr clt clu crb crc cre crk crl crr crt cru ctb ctc cte ctk ctl ctr ctt ctu cub cuc cue cuk cul cur cut cuu ebb ebc ebe ebk ebl ebr ebt ebu ec- ecb ecc ece eck ecl ecr ect ecu eeb eec eee eek eel eer eet ekb ekc eke ekl ekr ekt eku elb elc ele elk ell elr elt elu erb erc ere erk erl err ert eru etb etc ete etk etl etr ett etu eu- eub euc eue eul eur eut k-t kbb kbc kbe kbk kbl kbr kbu kcb kcc kce kck kcl kcr kct kcu ke- keb kec kee kek kel ker ket kkb kkc kke kkk kkl kkr kkt kku kl- klb klc klr klt klu krc krk krl krr krt kru ktb ktc kte ktk ktl ktr ktt ktu kub kuc kue kuk kul kur kut kuu lbb lbc lbe lbk lbl lbr lbt lbu lcb lcc lce lck lcl lcr lct lcu leb lec lee lek lel ler let leu lkb lkl lkr lkt llb llc lle llk lll llr llt llu lrb lrc lrk lrr lrt lru ltb ltc lte ltk ltl ltr ltt ltu lub luc lue luk lul lur lut luu rbb rbc rbe rbk rbl rbr rbt rbu rcb rcc rce rcl rcr rct rcu re- reb rec ree rek rel rer ret reu rkb rkc rke rkk rkt rku rlc rle rll rlr rlt rlu rrb rrc rrk rrl rrr rrt rru rtb rtc rte rtk rtl rtr rtt rtu rub ruc rue ruk rur rut ruu tbb tbc tbe tbk tbl tbr tbt tbu tcb tcc tce tck tcl tcr tct tcu te- teb tec tee tek tel ter tet teu tkb tkc tke tkk tkl tkr tkt tlc tle tlk tll tlr tlt tlu trb trc tre trk trl trr trt tru ttb ttc tte ttk ttl ttr ttt ttu tub tuc tue tuk tul tur tut tuu ubb ubc ube ubk ubl ubr ubt ubu ucb ucc uce uck ucl ucr uct ucu ueb uec uee uel uer uet ukb ukc uke ukk ukl ukr uku ulb ulc ule ulk ull ulr ult ulu ur- urb urc ure urk url urr urt uru utb utc ute utk utl utr utt utu uuc uue uur uut uuu

bbbb bbeb bbet bblb bbrc bcbc bccc bccl bcec bcer bcet bcru bctc bcuc bebb bebe beck becu beeb beek beel beer beet beke bele belk bell belt belu berc bere berk berr bert beru betc bete bett betu beuk beur blbt blcu bleb blee blek blet bleu blkb blrc blub blue blur blut brcb brce breb brec bree brek brel brer bret brkb brrr brtc bruc brue brut btcc btcl btec btek btrc btrt bttb bubb bube bubu bucc buce buck bucu buel buer bueu buke bukk buku bulb bule bulk bull bult bulu bur- burb bure burk burl burr burt buru but- bute butt cbbc cbcc cbce cbcl cbcr cbct cbcu cbec cbee cber cbet cbkl cbkr cblb cblc cbre cbrl cbrt cbtc cbtl ccbc cccb cccc cccl cccu ccee ccel cclc ccrc ccre ccrl ccrt cctb cctc cctl cctt ccuc ccut cebu cec- cece cect ceeb ceec ceel ceke cel- celc cele cell celt cer- cerc cere cerl cert cet- cete ckbc ckbe ckck ckcl cker ckrc cktb clec clee clek cler clet cleu cltb cltc club clue clut crbc crbu crcc crce crcr cre- creb crec cree cret creu crkc crkl crrt crtc crtl crub crue cruk crut ctec ctle ctrc ctrl cub- cubb cube cucc cuce cuck cuek cuer cuk- cuke culb culc cule culk cull cult curb cure curl curr curt cut- cutc cute cutt e-cl ebbc ebbr ebcc ebel eber ebru ebul ebur ecbc ecbe eccb eccc ecce eccl ecct eclt ecrc ecrl ecrr ecru ect- ectc eeee eeke eele eerc eetc eete eetu ekeb ekek eker eket ekur el-b elbe elbu elcb elce elec elee elek eler elet elke elle ellu elte elue elul erbb erbe ercc erce ereb erec erel erer eret erke erle erll errc erre ertl ertu erub eruc erur etbc etbr etcc etec etee etel eter etre ette ettu eubc euer eule eur- eurc eure eurt kbbb kbbc kbbe kbbk kbbl kbbr kbbt kbbu kbcb kbce kbck kbcl kbcr kbct kbcu kbeb kbec kbee kbek kbel kber kbet kbkb kbkk kbkl kbkr kblb kble kbll kblr kblt kblu kbrb kbrc kbre kbrk kbrl kbrt kbru kbtb kbtc kbte kbtk kbtl kbtr kbtt kbub kbuc kbue kbuk kbul kbur kbut kbuu kcbc kcbk kcbl kcbr kcbu kccb kccc kcck kccl kccr kcct kccu kceb kcec kcee kcel kcet kceu kckc kckk kckl kckr kclc kcle kclk kcll kclr kclt kclu kcrc kcrr kcrt kcru kctb kctc kcte kctu kcub kcue kcuk kcul kebb kebc kebe kebr kebt kebu keck kecr keek keel keer keet kekb kekc keke kekl keku kele kelk kell kelt kelu ker- kerb kerc kere kerk kerl kerr kert keru ket- ketc kete ketk ketr kett ketu keul keur kkbb kkbe kkbl kkbr kkbt kkcb kkck kkcl kkcr kkct kkkk kklb kklc kkll kkrb kkrc kkre kkrk kkrl kkrr kkrt kktc kktk kktl kktu kkut kkuu klbb klbc klbe klbl klbt klbu klcb klcc klce klck klcl klcr kleb klec klee klek kler klet klkc klkk klkl klkr kllb kllc klle kllk klrc klrk klrr klru kltc kltk kltr