-al a-a a-b a-c aaa aab aac aag aah aal aan aar ab- aba abb abc abg abh abl abn abr ac- aca acb acc acg ach acl acn acr ag- aga agb agc agg agh agl agn agr aha ahb ahc ahg ahh ahl ahn ahr al- ala alb alc alg alh all aln alr an- ana anb anc ang anh anl ann anr ar- ara arb arc arg arh arl arn arr baa bab bac bag bah bal ban bar bba bbb bbc bbg bbh bbl bbn bbr bca bcb bcc bcg bch bcl bcn bcr bga bgb bgc bgg bgh bgl bgn bgr bha bhb bhc bhg bhh bhl bhr bla blb blc blg blh bll bln blr bna bnb bnc bng bnl bnn bnr bra brb brg brh brl brn brr c-- caa cab cac cag cah cal can car cba cbb cbc cbg cbh cbl cbn cbr cca ccb ccc ccg cch ccl ccn ccr cga cgb cgc cgg cgh cgl cgn cgr ch- cha chb chc chg chh chl chn chr cl- cla clb clc clg clh cll cln clr cn- cna cnb cnc cng cnh cnl cnn cnr cra crb crc crg crh crl crn crr gaa gab gac gag gah gal gan gar gba gbc gbg gbh gbl gbn gbr gca gcb gcc gcg gch gcl gcn gcr gga ggb ggc ggg ggh ggn ggr gha ghb ghc ghg ghh ghl ghn ghr gla glb glc glg glh gll gln glr gna gnb gnc gnl gnn gnr gra grb grc grg grh grl grn grr haa hab hac hag hah hal han har hba hbb hbc hbg hbh hbl hbn hbr hca hcb hcc hcg hch hcl hcn hcr hga hgb hgc hgg hgh hgl hgn hgr hha hhb hhc hhg hhh hhl hhn hhr hla hlb hlc hlg hlh hll hln hlr hna hnb hnc hng hnh hnl hnn hr- hra hrb hrc hrg hrh hrl hrn hrr la- laa lab lac lag lah lal lan lar lba lbb lbc lbg lbh lbl lbr lca lcb lcc lcg lch lcl lcn lcr lga lgb lgc lgg lgh lgl lgn lgr lha lhb lhc lhh lhr lla llb llc llg lll lln llr lna lnb lnc lng lnh lnl lnn lnr lra lrb lrc lrg lrh lrn lrr naa nab nac nag nah nal nan nar nba nbb nbc nbg nbl nbn nbr nca ncb ncc ncg nch ncl ncn ncr nga ngb ngc ngg ngh ngl ngn nha nhb nhc nhg nhh nhl nhn nhr nla nlb nlc nlg nlh nll nln nlr nna nnb nnc nng nnh nnl nnn nra nrb nrc nrg nrl nrn nrr ra- raa rab rac rag rah ral ran rar rba rbb rbc rbg rbh rbl rbn rbr rca rcb rcc rcg rch rcl rcn rcr rga rgb rgc rgg rgh rgn rgr rh- rha rhb rhc rhg rhh rhl rhn rhr rla rlc rlg rlh rll rln rlr rna rnb rnc rng rnh rnn rnr rra rrb rrc rrg rrh rrl rrn rrr