-er -ic b-u bbb bbc bbe bbi bbk bbr bbt bbu bcb bcc bce bci bck bcr bct bcu be- beb bec bee bei bek ber bet beu bi- bib bic bie bii bik bir bit biu bkb bkc bke bkk bkr bkt brb bre bri brk brr brt bru btb btc bte bti btk btr btt btu bub buc bue bui buk bur but buu c-- cbb cbc cbe cbi cbk cbr cbt cbu ccb ccc cce cci cck ccr cct ccu ce- ceb cec cee cei cek cer cet ceu ci- cib cic cie cii cik cir cit ciu ckb ckc cki ckt crb crc cre cri crk crr crt cru ctb ctc cte cti ctk ctr ctt ctu cub cuc cue cui cuk cur cut cuu ebb ebc ebe ebi ebk ebr ebt ebu ec- ecb ecc ece eci eck ecr ect ecu eeb eec eee eek eer eet eib eic eie eii eik eir eit eiu ekb ekc eke eki ekr ekt eku erb erc ere eri erk err ert eru etb etc ete eti etk etr ett etu eu- eub euc eue eui eur eut ibb ibc ibe ibi ibk ibr ibt ibu icb icc ice ici ick icr ict icu ie- iec iee iei iek ier iet iib iic iie iii iir iit iiu ikb ikc ike iki ikk ikr ikt iku ir- irb irc ire iri irk irr irt iru itb itc ite iti itk itt itu iu- iub iuc iue iui iur iut k-t kbb kbc kbe kbi kbk kbr kbu kcb kcc kce kci kck kcr kct kcu ke- keb kec kee kei kek ker ket kib kic kie kii kik kir kit kiu kkb kkc kke kki kkk kkr kkt kku krc kri krk krr krt kru ktb ktc kte ktk ktr ktt ktu kub kuc kue kui kuk kur kut kuu rbb rbc rbe rbi rbk rbr rbt rbu rcb rcc rce rci rcr rct rcu re- reb rec ree rei rek rer ret reu rib ric rie rii rik rir rit rkb rkc rke rkk rkt rku rrb rrc rri rrk rrr rrt rru rtb rtc rte rti rtk rtr rtt rtu rub ruc rue rui ruk rur rut ruu tbb tbc tbe tbi tbk tbr tbt tbu tcb tcc tce tci tck tcr tct tcu te- teb tec tee tei tek ter tet teu tib tic tie tii tik tir tit tiu tkb tkc tke tkk tkr tkt trb trc tre tri trk trr trt tru ttb ttc tte tti ttk ttr ttt ttu tub tuc tue tui tuk tur tut tuu ubb ubc ube ubi ubk ubr ubt ubu ucb ucc uce uci uck ucr uct ucu ueb uec uee uei uer uet uib uic uie uii uir uit uiu ukb ukc uke uki ukk ukr uku ur- urb urc ure uri urk urr urt uru utb utc ute uti utk utr utt utu uuc uue uur uut uuu

bbbb bbci bbeb bbet bbrc bcbc bccc bcci bcec bcer bcet bcie bcit bcru bctc bcuc bebb bebe bebi beci beck becu beeb beek beer beet beic beik beir beit beke beki berc bere beri berk berr bert beru betc bete beti bett betu beuk beur bibb bibe bibi bicc bice bici bick bieb bier biet bieu bike biku birb bire biri birk birr birt biru bitc bite bitt bitu brcb brce breb brec bree brei brek brer bret bric brie brik brit brkb brrr brtc bruc brue brut btcc btec btek btie btrc btrt bttb bubb bube bubi bubu bucc buce buci buck bucu buer bueu buic buie buik buir buit buiu buke buki bukk buku bur- burb bure buri burk burr burt buru but- bute buti butt cbbc cbcc cbce cbcr cbct cbcu cbec cbee cber cbet cbir cbit cbkr cbre cbrt cbtc ccbc cccb cccc ccci cccu ccee ccic ccii ccir ccrc ccre ccri ccrt cctb cctc cctt ccuc ccut cebu cec- cece ceci cect ceeb ceec ceke cer- cerc cere ceri cert cet- cete ceti ceui cibc cibe cibi cicc cici cicr cict cicu ciee cier ciii ciit cikr cirb circ cire ciri cirk cirr cirt citb cite citi citt citu ciuc ckbc ckbe ckbi ckck cker ckrc cktb crbc crbu crcc crce crcr cre- creb crec cree crei cret creu crib cric crie crik crit criu crkc crrt crtc crub crue cruk crut ctbi ctec ctic ctrc cub- cubb cube cubi cucc cuce cuci cuck cuek cuer cui- cuir cuit cuk- cuke curb cure curi curr curt cut- cutc cute cutt ebbc ebbr ebcc eber ebic ebit ebru ebur ecbc ecbe eccb eccc ecce ecci ecct ecib ecit ecrc ecri ecrr ecru ect- ectc eeee eeke eerc eetc eete eetu eick eiec eiei eier eike eiki eire eitb eitc eiti eitr ekeb ekek eker eket ekki ekur erbb erbe ercc erce ereb erec erei erer eret eric erie erik erit eriu erke erki errc erre ertu erub eruc erur etbc etbr etcc etec etee eter etic etik etre ette etti ettu etui eubc eubi euer eur- eurc eure eurt i-be ibec ibet ibie ibrc ibri ibtb ibtc icbc iccb iccc icci iccr icct iccu icec icee icer icet icke icrc icre icrr icrt icru icub icue iecc ieet ieie iere ieri iett iiie iiii iiit iirc iitr iitt iiuc ikee iker ikki ikri ikue irbe ircc ircu iree irer iri- iric irie irki irrc irre irri irte irti itbe itec itek iter itet itic itie itri itur iucc iuce iuiu k-ci kbbb kbbc kbbe kbbi kbbk kbbr kbbt kbbu kbcb kbce kbci kbck kbcr kbct kbcu kbeb kbec kbee kbek kber kbet kbib kbic kbie kbik kbit kbiu kbkb kbkk kbkr kbrb kbrc kbre kbri kbrk kbrt kbru kbtb kbtc kbte kbtk kbtr kbtt kbub kbuc kbue kbuk kbur kbut kbuu kcbc kcbi kcbk kcbr kcbu kccb kccc kcci kcck kccr kcct kccu kceb kcec kcee kcei kcet kceu kcic kcie kcii kcir kcit kciu kckc kckk kckr kcrc kcri kcrr kcrt