-er b-u bbb bbc bbe bbk bbn bbr bbt bbu bcb bcc bce bck bcn bcr bct bcu be- beb bec bee bek ben ber bet beu bkb bkc bke bkk bkn bkr bkt bnb bnc bne bnk bnn bnr bnt bnu brb bre brk brn brr brt bru btb btc bte btk btn btr btt btu bub buc bue buk bun bur but buu c-- cbb cbc cbe cbk cbn cbr cbt cbu ccb ccc cce cck ccn ccr cct ccu ce- ceb cec cee cek cen cer cet ceu ckb ckc ckt cn- cnb cnc cne cnn cnr cnt cnu crb crc cre crk crn crr crt cru ctb ctc cte ctk ctn ctr ctt ctu cub cuc cue cuk cun cur cut cuu ebb ebc ebe ebk ebn ebr ebt ebu ec- ecb ecc ece eck ecn ecr ect ecu eeb eec eee eek een eer eet ekb ekc eke ekr ekt eku en- enb enc ene enk enn enr ent enu erb erc ere erk ern err ert eru etb etc ete etk etn etr ett etu eu- eub euc eue eun eur eut k-t kbb kbc kbe kbk kbn kbr kbu kcb kcc kce kck kcn kcr kct kcu ke- keb kec kee kek ken ker ket kkb kkc kke kkk kkn kkr kkt kku kn- knc kne knk knn knr knt knu krc krk krn krr krt kru ktb ktc kte ktk ktn ktr ktt ktu kub kuc kue kuk kun kur kut kuu nbb nbc nbe nbk nbn nbr nbt nbu ncb ncc nce nck ncn ncr nct ncu ne- neb nec nee nek nen ner net neu nkc nke nkk nkn nkr nkt nku nnb nnc nne nnk nnn nnt nnu nrb nrc nre nrk nrn nrr nrt nru ntb ntc nte ntk ntn ntr ntt ntu nub nuc nue nuk nun nur nut nuu rbb rbc rbe rbk rbn rbr rbt rbu rcb rcc rce rcn rcr rct rcu re- reb rec ree rek ren rer ret reu rkb rkc rke rkk rkt rku rnb rnc rnn rnr rnt rnu rrb rrc rrk rrn rrr rrt rru rtb rtc rte rtk rtn rtr rtt rtu rub ruc rue ruk run rur rut ruu tbb tbc tbe tbk tbn tbr tbt tbu tcb tcc tce tck tcn tcr tct tcu te- teb tec tee tek ten ter tet teu tkb tkc tke tkk tkr tkt tnb tnc tne tnk tnn tnr tnt trb trc tre trk trn trr trt tru ttb ttc tte ttk ttn ttr ttt ttu tub tuc tue tuk tun tur tut tuu ubb ubc ube ubk ubn ubr ubt ubu ucb ucc uce uck ucn ucr uct ucu ueb uec uee uen uer uet ukb ukc uke ukk ukn ukr uku un- unb unc une unk unn unr unt unu ur- urb urc ure urk urn urr urt uru utb utc ute utk utn utr utt utu uuc uue uun uur uut uuu

-ene bbbb bbeb bbet bbrc bcbc bccc bcec bcer bcet bcnu bcru bctc bcuc bebb bebe beck becu beeb beek been beer beet beke bene benk benn bent benu berc bere berk bern berr bert beru betc bete bett betu beuk beur bner bnet bnrr brcb brce breb brec bree brek bren brer bret brkb brrr brtc bruc brue brun brut btcc btec btek bten btrc btrt bttb bubb bube bubu bucc buce buck bucu buen buer bueu buke bukk buku bunb bune bunk bunn bunt bunu bur- burb bure burk burn burr burt buru but- bute butt cbbc cbcc cbce cbcn cbcr cbct cbcu cbec cbee cber cbet cbkn cbkr cbre cbrn cbrt cbtc ccbc ccbn cccb cccc cccu ccee ccnb ccnc ccne ccnr ccnu ccrc ccre ccrt cctb cctc cctt ccuc ccut cebu cec- cece cect ceeb ceec ceke cen- cene cent cer- cerc cere cern cert cet- cete ckbc ckbe ckck cken cker cknb cknc cknt ckrc cktb cnbc cnet cnrc cnrr cnrt cntc cntk cntr cnut crbc crbu crcc crce crcr cre- creb crec cree cren cret creu crkc crne crrt crtc crub crue cruk crun crut ctec cten ctne ctrc ctrn cttn cub- cubb cube cucc cuce cuck cucn cuek cuer cuk- cuke cune cunt curb cure curn curr curt cut- cutc cute cutt ebbc ebbr ebcc eben eber ebru ebur ecbc ecbe eccb eccc ecce ecct ecne ecrc ecrr ecru ect- ectc eeee eeke eent eerc eetc eete eetu ekeb ekek eken eker eket ekne ekur enb- enbn enbr ence enee ener enke enkr ennc enne ennu ent- ente entr enue enur enut erbb erbe ercc erce ereb erec eren erer eret erke erne errc erre ertu erub eruc erur etbc etbr etcc etec etee eten eter etne etnr etre ette ettn ettu etun eubc euer eur- eurc eure eurt kbbb kbbc kbbe kbbk kbbr kbbt kbbu kbcb kbce kbck kbcr kbct kbcu kbeb kbec kbee kbek kben kber kbet kbkb kbkk kbkr kbnn kbnr kbnu kbrb kbrc kbre kbrk kbrn kbrt kbru kbtb kbtc kbte kbtk kbtn kbtr kbtt kbub kbuc kbue kbuk kbun kbur kbut kbuu kcbc kcbk kcbr kcbu kccb kccc kcck kccr kcct kccu kceb kcec kcee kcet kceu kckc kckk kckn kckr kcnb kcnr kcnt kcrc kcrn kcrr kcrt kcru kctb kctc kcte kctn kctu kcub kcue kcuk kebb kebc kebe kebn kebr kebt kebu keck kecr keek keen keer keet kekb kekc keke keku ken- kene kenk kenn kenr kent kenu ker- kerb kerc kere kerk kern kerr kert keru ket- ketc kete ketk ketr kett ketu keun keur kkbb kkbe kkbn kkbr kkbt kkcb kkck kkcn kkcr kkct kken kkkk kknb kkne kknn kknt kknu kkrb kkrc kkre kkrk kkrn kkrr kkrt kktc kktk kktu kkut kkuu knbb knbc knbe knbn knbr knbt knbu kncb knce knck kncn kncr knct kncu kneb knec knee knek knen knet kneu knkk knkt knnb knnk knnr knrb knrk knte kntk kntn kntr kntu knub knue knuk knur knut krbb krbe krbk krbr krbt krcb krcc