-er b-u bbb bbc bbe bbf bbk bbr bbt bbu bcb bcc bce bcf bck bcr bct bcu be- beb bec bee bef bek ber bet beu bfb bfc bfe bff bfr bft bfu bkb bkc bke bkf bkk bkr bkt brb bre brf brk brr brt bru btb btc bte btf btk btr btt btu bub buc bue buf buk bur but buu c-- cbb cbc cbe cbf cbk cbr cbt cbu ccb ccc cce ccf cck ccr cct ccu ce- ceb cec cee cef cek cer cet ceu cfb cfc cfe cff cfk cfr cft cfu ckb ckc ckt crb crc cre crf crk crr crt cru ctb ctc cte ctf ctk ctr ctt ctu cub cuc cue cuf cuk cur cut cuu ebb ebc ebe ebf ebk ebr ebt ebu ec- ecb ecc ece ecf eck ecr ect ecu eeb eec eee eef eek eer eet ef- efb efc efe eff efr eft ekb ekc eke ekf ekr ekt eku erb erc ere erf erk err ert eru etb etc ete etf etk etr ett etu eu- eub euc eue euf eur eut fbb fbc fbe fbf fbk fbr fbt fbu fcb fcc fce fcf fck fcr fct fcu feb fec fee fef fek fer fet feu ffc ffe fff ffk ffr fft ffu fkb fkc fkf fkk fkt frb frc fre frf frk frr frt fru ftb ftc fte ftf ftk ftr ftt ftu fub fue fuf fuk fur fut fuu k-t kbb kbc kbe kbf kbk kbr kbu kcb kcc kce kck kcr kct kcu ke- keb kec kee kef kek ker ket kfc kff kfu kkb kkc kke kkk kkr kkt kku krc krf krk krr krt kru ktb ktc kte ktf ktk ktr ktt ktu kub kuc kue kuk kur kut kuu rbb rbc rbe rbf rbk rbr rbt rbu rcb rcc rce rcf rcr rct rcu re- reb rec ree ref rek rer ret reu rfb rfc rfe rff rfk rfr rft rfu rkb rkc rke rkf rkk rkt rku rrb rrc rrf rrk rrr rrt rru rtb rtc rte rtf rtk rtr rtt rtu rub ruc rue ruf ruk rur rut ruu tbb tbc tbe tbf tbk tbr tbt tbu tcb tcc tce tcf tck tcr tct tcu te- teb tec tee tef tek ter tet teu tfb tfc tfe tff tfk tfr tft tfu tkb tkc tke tkk tkr tkt trb trc tre trf trk trr trt tru ttb ttc tte ttf ttk ttr ttt ttu tub tuc tue tuf tuk tur tut tuu ubb ubc ube ubf ubk ubr ubt ubu ucb ucc uce ucf uck ucr uct ucu ueb uec uee uef uer uet ufc ufe uff ufr uft ufu ukb ukc uke ukf ukk ukr uku ur- urb urc ure urf urk urr urt uru utb utc ute utf utk utr utt utu uuc uue uur uut uuu

bbbb bbeb bbet bbfc bbrc bcbc bccc bcec bcer bcet bcfc bcru bctc bcuc bebb bebe beck becu beeb beef beek beer beet befe beff beft beke berc bere berk berr bert beru betc bete bett betu beuk beur bftt brcb brce breb brec bree bref brek brer bret brfc brfu brkb brrr brtc bruc brue brut btcc btec btek btfc btrc btrt bttb bubb bube bubu bucc buce buck bucu buer bueu bufc bufe buff bufr buke bukk buku bur- burb bure burk burr burt buru but- bute butt cbbc cbcc cbce cbcr cbct cbcu cbec cbee cbef cber cbet cbfb cbfc cbkr cbre cbrt cbtc cbtf ccbc cccb cccc cccf cccu ccee ccfc ccff ccrc ccre ccrf ccrt cctb cctc cctt ccuc ccut cebu cec- cece cect ceeb ceec cef- cefc ceke cer- cerc cere cerf cert cet- cete cfbc cfbr cfbt cfcb cfcf cffb cffr cfrb cfre cfrt cftc cfte cftk cftr ckbc ckbe ckck cker ckfr ckrc cktb crbc crbu crcc crce crcr cre- creb crec cree cret creu crfc crkc crrt crtc crtf crub crue cruk crut ctcf ctec ctfc ctrc cub- cubb cube cucc cuce cuck cuek cuer cufc cuff cuk- cuke curb cure curf curr curt cut- cutc cute cutt ebbc ebbr ebcc eber ebfc ebru ebur ecbc ecbe eccb eccc ecce ecct ecef ecfc ecfr ecrc ecrf ecrr ecru ect- ectc ectf eeee eefe eeke eerc eetc eete eetu efbr efet efke eft- eftu ekeb ekek eker eket ekfc ekur erbb erbe ercc erce ereb erec erer eret erfc erft erke errc erre ertu erub eruc erur etbc etbr etcc etec etee eter etfb etfc etfe etre ette ettu eubc euer eufc eur- eurc eure eurt f--k fccf fcuk fece feck fect feeb feek feer feet fefc fefe feff feke ferb ferc fere ferk ferr fert feru fete fetr fett fetu ffcc ffee ffff ffrr fftf frbc frcc free fret frfc frub frue ft-c fter ftfc ftub ftuc fubb fubu fuc- fuck fuct fuet fufc fuff fufu fuke fukk fuku fur- fure furr furt fute futu kbbb kbbc kbbe kbbf kbbk kbbr kbbt kbbu kbcb kbce kbck kbcr kbct kbcu kbeb kbec kbee kbef kbek kber kbet kbfb kbfc kbff kbfk kbfr kbft kbkb kbkf kbkk kbkr kbrb kbrc kbre kbrf kbrk kbrt kbru kbtb kbtc kbte kbtf kbtk kbtr kbtt kbub kbuc kbue kbuf kbuk kbur kbut kbuu kcbc kcbf kcbk kcbr kcbu kccb kccc kcck kccr kcct kccu kceb kcec kcee kcet kceu kcfb kcfc kcft kckc kckf kckk kckr kcrc kcrr kcrt kcru kctb kctc kcte kctu kcub kcue kcuf kcuk kebb kebc kebe kebr kebt kebu keck kecr keef keek keer keet kefb kefc keff kefr keft kekb kekc keke keku ker- kerb kerc kere kerf kerk kerr kert keru ket- ketc kete ketf ketk ketr kett ketu keur kfbc kfbk kfbt kfcf kfcr kfeb kfer kffb kfff kffk kfkb kfrc kfre kfrr kfru kftc kfte kftk kftt kftu kfut kkbb kkbe kkbr kkbt kkcb kkck kkcr kkct kkfr kkft kkkk kkrb kkrc kkre kkrf kkrk kkrr kkrt kktc kktk kktu kkut kkuu krbb krbe krbk krbr