-al -er a-a a-b a-c aaa aab aac aae aag aak aal aan aar aau ab- aba abb abc abe abg abk abl abn abr abu ac- aca acb acc ace acg ack acl acn acr acu aea aeb aec aee aeg aek ael aen aer aeu ag- aga agb agc age agg agk agl agn agr agu aka akb akc ake akg akk akl akn akr aku al- ala alb alc ale alg alk all aln alr alu an- ana anb anc ane ang ank anl ann anr anu ar- ara arb arc are arg ark arl arn arr aru au- aua aub auc aue aug auk aul aun aur b-u baa bab bac bae bag bak bal ban bar bau bba bbb bbc bbe bbg bbk bbl bbn bbr bbu bca bcb bcc bce bcg bck bcl bcn bcr bcu be- bea beb bec bee beg bek bel ben ber beu bga bgb bgc bge bgg bgk bgl bgn bgr bgu bka bkb bkc bke bkg bkk bkl bkn bkr bla blb blc ble blg blk bll bln blr blu bna bnb bnc bne bng bnk bnl bnn bnr bnu bra brb bre brg brk brl brn brr bru bua bub buc bue bug buk bul bun bur buu c-- caa cab cac cae cag cak cal can car cau cba cbb cbc cbe cbg cbk cbl cbn cbr cbu cca ccb ccc cce ccg cck ccl ccn ccr ccu ce- cea ceb cec cee ceg cek cel cen cer ceu cga cgb cgc cge cgg cgl cgn cgr cgu cka ckb ckc cl- cla clb clc cle clg clk cll cln clr clu cn- cna cnb cnc cne cng cnl cnn cnr cnu cra crb crc cre crg crk crl crn crr cru cua cub cuc cue cug cuk cul cun cur cuu eaa eab eac eae eag eak eal ean ear eau eba ebb ebc ebe ebg ebk ebl ebn ebr ebu ec- eca ecb ecc ece ecg eck ecl ecn ecr ecu eea eeb eec eee eeg eek eel een eer ega egb egc ege egg egl egn egr egu eka ekb ekc eke ekg ekl ekr eku ela elb elc ele elg elk ell eln elr elu en- ena enb enc ene eng enk enl enn enr enu era erb erc ere erg erk erl ern err eru eu- eua eub euc eue eug eul eun eur gaa gab gac gae gag gak gal gan gar gau gba gbc gbe gbg gbk gbl gbn gbr gbu gca gcb gcc gce gcg gck gcl gcn gcr gcu ge- gea geb gec gee geg gek gel gen ger geu gga ggb ggc ggg ggn ggr ggu gka gkb gkn gla glb glc gle glg glk gll gln glr glu gna gnb gnc gne gnl gnn gnr gnu gra grb grc gre grg grk grl grn grr gru gu- gua gub guc gue gug guk gul gun gur guu ka- kaa kab kac kae kag kak kal kan kar kau kba kbb kbc kbe kbk kbl kbn kbr kbu kca kcb kcc kce kcg kck kcl kcn kcr kcu ke- kea keb kec kee keg kek kel ken ker kga kgb kgc kgl kgu kkb kkc kke kkk kkl kkn kkr kku kl- kla klb klc klg klr klu kn- kna knc kne kng knk knl knn knr knu kra krc krg krk krl krn krr kru kub kuc kue kug kuk kul kun kur kuu la- laa lab lac lae lag lak lal lan lar lau lba lbb lbc lbe lbg lbk lbl lbr lbu lca lcb lcc lce lcg lck lcl lcn lcr lcu lea leb lec lee leg lek lel len ler leu lga lgb lgc lge lgg lgk lgl lgn lgr lgu lka lkb lkg lkl lkr lla llb llc lle llg llk lll lln llr llu lna lnb lnc lne lng lnk lnl lnn lnr lnu lra lrb lrc lrg lrk lrn lrr lru lua lub luc lue lug luk lul lun lur luu naa nab nac nae nag nak nal nan nar nau nba nbb nbc nbe nbg nbk nbl nbn nbr nbu nca ncb ncc nce ncg nck ncl ncn ncr ncu ne- nea neb nec nee neg nek nel nen ner neu nga ngb ngc nge ngg ngk ngl ngn ngu nka nkc nke nkk nkn nkr nku nla nlb nlc nle nlg nlk nll nln nlr nlu nna nnb nnc nne nng nnk nnl nnn nnu nra nrb nrc nre nrg nrk nrl nrn nrr nru nua nub nuc nue nug nuk nul nun nur nuu ra- raa rab rac rae rag rak ral ran rar rau rba rbb rbc rbe rbg rbk rbl rbn rbr rbu rca rcb rcc rce rcg rcl rcn rcr rcu re- rea reb rec ree reg rek rel ren rer reu rga rgb rgc rge rgg rgk rgn rgr rkb rkc rke rkg rkk rku rla rlc rle rlg rll rln rlr rlu rna rnb rnc rng rnn rnr rnu rra rrb rrc rrg rrk rrl rrn rrr rru rua rub ruc rue rug ruk run rur ruu ua- uaa uab uac uae uag uak ual uan uar uau uba ubb ubc ube ubg ubk ubl ubn ubr ubu uca ucb ucc uce ucg uck ucl ucn ucr ucu uea ueb uec uee ueg uel uen uer uga ugb ugc uge ugg ugk ugl ugn ugr ugu uka ukb ukc uke ukk ukl ukn ukr uku ula ulb ulc ule ulg ulk ull uln ulr ulu un- una unb unc une ung unk unl unn unr unu ur- ura urb urc ure urg urk url urn urr uru uua uuc uue uug uun uur uuu