-er b-u bbb bbc bbe bbf bbh bbl bbn bbr bbu bcb bcc bce bcf bch bcl bcn bcr bcu be- beb bec bee bef beh bel ben ber beu bfb bfc bfe bff bfh bfl bfn bfr bfu bhb bhc bhe bhf bhh bhl bhr bhu blb blc ble blf blh bll bln blr blu bnb bnc bne bnf bnl bnn bnr bnu brb bre brf brh brl brn brr bru bub buc bue buf buh bul bun bur buu c-- cbb cbc cbe cbf cbh cbl cbn cbr cbu ccb ccc cce ccf cch ccl ccn ccr ccu ce- ceb cec cee cef ceh cel cen cer ceu cfb cfc cfe cff cfh cfl cfn cfr cfu ch- chb chc che chf chh chl chn chr chu cl- clb clc cle clf clh cll cln clr clu cn- cnb cnc cne cnf cnh cnl cnn cnr cnu crb crc cre crf crh crl crn crr cru cub cuc cue cuf cuh cul cun cur cuu ebb ebc ebe ebf ebh ebl ebn ebr ebu ec- ecb ecc ece ecf ech ecl ecn ecr ecu eeb eec eee eef eel een eer ef- efb efc efe eff efh efl efr ehb ehc ehe ehf ehh ehl ehn ehr ehu elb elc ele elf elh ell eln elr elu en- enb enc ene enf enh enl enn enr enu erb erc ere erf erh erl ern err eru eu- eub euc eue euf eul eun eur fbb fbc fbe fbf fbh fbl fbn fbr fbu fcb fcc fce fcf fcl fcn fcr fcu feb fec fee fef feh fel fen fer feu ffc ffe fff ffh ffl ffn ffr ffu fhb fhc fhe fhf fhh fhl fhn fhr flb flc fle flf fll fln flr flu fnb fnc fne fnf fnh fnl fnn fnr fnu frb frc fre frf frh frl frn frr fru fub fue fuf ful fun fur fuu hbb hbc hbe hbf hbh hbl hbn hbr hbu hcb hcc hce hcf hch hcl hcn hcr he- heb hec hee hef heh hel hen her heu hfb hfc hfe hff hfh hfl hfn hfr hfu hhb hhc hhe hhf hhh hhl hhn hhr hhu hlb hlc hle hlf hlh hll hln hlr hlu hnb hnc hne hnf hnh hnl hnn hnu hr- hrb hrc hre hrf hrh hrl hrn hrr hru hub huc hue huf huh hul hun hur huu lbb lbc lbe lbf lbh lbl lbr lbu lcb lcc lce lcf lch lcl lcn lcr lcu leb lec lee lef leh lel len ler leu lfb lfc lfe lff lfh lfl lfn lfr lfu lhb lhc lhf lhh lhr lhu llb llc lle llf lll lln llr llu lnb lnc lne lnh lnl lnn lnr lnu lrb lrc lrf lrh lrn lrr lru lub luc lue luf luh lul lun lur luu nbb nbc nbe nbf nbl nbn nbr nbu ncb ncc nce ncf nch ncl ncn ncr ncu ne- neb nec nee nef neh nel nen ner neu nfb nfc nfe nff nfl nfn nfr nfu nhb nhc nhe nhf nhh nhl nhn nhr nhu nlb nlc nle nlf nlh nll nln nlr nlu nnb nnc nne nnf nnh nnl nnn nnu nrb nrc nre nrf nrl nrn nrr nru nub nuc nue nuh nul nun nur nuu rbb rbc rbe rbf rbh rbl rbn rbr rbu rcb rcc rce rcf rch rcl rcn rcr rcu re- reb rec ree ref reh rel ren rer reu rfb rfc rfe rff rfh rfl rfn rfr rfu rh- rhb rhc rhe rhf rhh rhl rhn rhr rhu rlc rle rlf rlh rll rln rlr rlu rnb rnc rnh rnn rnr rnu rrb rrc rrf rrh rrl rrn rrr rru rub ruc rue ruf ruh run rur ruu ubb ubc ube ubf ubh ubl ubn ubr ubu ucb ucc uce ucf uch ucl ucn ucr ucu ueb uec uee uef ueh uel uen uer ufc ufe uff ufh ufl ufn ufr ufu uhb uhc uhe uhf uhh uhl uhr uhu ulb ulc ule ulf ull uln ulr ulu un- unb unc une unf unh unl unn unr unu ur- urb urc ure urf url urn urr uru uuc uue uun uur uuu

-ene bbbb bbch bbeb bbfc bbfn bblb bbrc bcbc bccc bccl bcec bcer bcfc bche bcnu bcru bcuc bebb bebe bech becu beeb beef beel been beer befe beff behn behr bele bell belu bene benn benu berc bere bern berr beru beur bffl bhcc bhel bher bhff bhur bhuu blcu bleb blee bleh bleu blfc blrc blub blue bluf blur bner bnrr brcb brce breb brec bree bref brel bren brer brfc brfu brrr bruc brue bruh brun bubb bube bubu bucc buce buch bucu buel buen buer bueu bufc bufe buff bufr buhe buhl buhr bulb bule bull bulu bunb bune bunn bunu bur- burb bure burh burl burn burr buru cbbc cbcc cbce cbcl cbcn cbcr cbcu cbec cbee cbef cber cbfb cbfc cbhl cblb cblc cbln cbre cbrh cbrl cbrn ccbc ccbn cccb cccc cccf cccl cccu ccee ccel ccfc ccff ccfl cche cchl cchr cclc ccnb ccnc ccne ccnf ccnr ccnu ccrc ccre ccrf ccrl ccuc cebu cec- cece ceeb ceec ceel cef- cefc cefn cehl cel- celc cele celf cell cen- cene cer- cerc cere cerf cerl cern cfbc cfbn cfbr cfcb cfcf cfcl cfcn cffb cffr cfln cfnb cfnr cfrb cfre cfrn cfun chce chch cheb chec chee chef cheh chel chen cher cheu chfc chfr chlc chln chlr chnb chnc chnl chnr chrb chrc chrf chrn chrr chub chul chun chur clec clee clef cler cleu club clue cluh clun cnbc cnbl cnel cnrc cnrr crbc crbu crcc crce crcr cre- creb crec cree creh cren creu crfc crfl crlf crne crub crue crun cub- cubb cube cucc cuce cucn cuer cufc cuff culb culc cule cull cune curb cure curf curl curn curr e-cl ebbc ebbr ebcc ebel eben eber ebfc ebru ebul ebur ecbc ecbe eccb eccc