-al -er a-a a-b a-c aaa aab aac aae aag aal aan aar aau ab- aba abb abc abe abg abl abn abr abu ac- aca acb acc ace acg acl acn acr acu aea aeb aec aee aeg ael aen aer aeu ag- aga agb agc age agg agl agn agr agu al- ala alb alc ale alg all aln alr alu an- ana anb anc ane ang anl ann anr anu ar- ara arb arc are arg arl arn arr aru au- aua aub auc aue aug aul aun aur b-u baa bab bac bae bag bal ban bar bau bba bbb bbc bbe bbg bbl bbn bbr bbu bca bcb bcc bce bcg bcl bcn bcr bcu be- bea beb bec bee beg bel ben ber beu bga bgb bgc bge bgg bgl bgn bgr bgu bla blb blc ble blg bll bln blr blu bna bnb bnc bne bng bnl bnn bnr bnu bra brb bre brg brl brn brr bru bua bub buc bue bug bul bun bur buu c-- caa cab cac cae cag cal can car cau cba cbb cbc cbe cbg cbl cbn cbr cbu cca ccb ccc cce ccg ccl ccn ccr ccu ce- cea ceb cec cee ceg cel cen cer ceu cga cgb cgc cge cgg cgl cgn cgr cgu cl- cla clb clc cle clg cll cln clr clu cn- cna cnb cnc cne cng cnl cnn cnr cnu cra crb crc cre crg crl crn crr cru cua cub cuc cue cug cul cun cur cuu eaa eab eac eae eag eal ean ear eau eba ebb ebc ebe ebg ebl ebn ebr ebu ec- eca ecb ecc ece ecg ecl ecn ecr ecu eea eeb eec eee eeg eel een eer ega egb egc ege egg egl egn egr egu ela elb elc ele elg ell eln elr elu en- ena enb enc ene eng enl enn enr enu era erb erc ere erg erl ern err eru eu- eua eub euc eue eug eul eun eur gaa gab gac gae gag gal gan gar gau gba gbc gbe gbg gbl gbn gbr gbu gca gcb gcc gce gcg gcl gcn gcr gcu ge- gea geb gec gee geg gel gen ger geu gga ggb ggc ggg ggn ggr ggu gla glb glc gle glg gll gln glr glu gna gnb gnc gne gnl gnn gnr gnu gra grb grc gre grg grl grn grr gru gu- gua gub guc gue gug gul gun gur guu la- laa lab lac lae lag lal lan lar lau lba lbb lbc lbe lbg lbl lbr lbu lca lcb lcc lce lcg lcl lcn lcr lcu lea leb lec lee leg lel len ler leu lga lgb lgc lge lgg lgl lgn lgr lgu lla llb llc lle llg lll lln llr llu lna lnb lnc lne lng lnl lnn lnr lnu lra lrb lrc lrg lrn lrr lru lua lub luc lue lug lul lun lur luu naa nab nac nae nag nal nan nar nau nba nbb nbc nbe nbg nbl nbn nbr nbu nca ncb ncc nce ncg ncl ncn ncr ncu ne- nea neb nec nee neg nel nen ner neu nga ngb ngc nge ngg ngl ngn ngu nla nlb nlc nle nlg nll nln nlr nlu nna nnb nnc nne nng nnl nnn nnu nra nrb nrc nre nrg nrl nrn nrr nru nua nub nuc nue nug nul nun nur nuu ra- raa rab rac rae rag ral ran rar rau rba rbb rbc rbe rbg rbl rbn rbr rbu rca rcb rcc rce rcg rcl rcn rcr rcu re- rea reb rec ree reg rel ren rer reu rga rgb rgc rge rgg rgn rgr rla rlc rle rlg rll rln rlr rlu rna rnb rnc rng rnn rnr rnu rra rrb rrc rrg rrl rrn rrr rru rua rub ruc rue rug run rur ruu ua- uaa uab uac uae uag ual uan uar uau uba ubb ubc ube ubg ubl ubn ubr ubu uca ucb ucc uce ucg ucl ucn ucr ucu uea ueb uec uee ueg uel uen uer uga ugb ugc uge ugg ugl ugn ugr ugu ula ulb ulc ule ulg ull uln ulr ulu un- una unb unc une ung unl unn unr unu ur- ura urb urc ure urg url urn urr uru uua uuc uue uug uun uur uuu