a-a a-b aaa aab aag aah aak aan aar ab- aba abb abg abh abk abn abr ag- aga agb agg agh agk agn agr aha ahb ahg ahh ahk ahn ahr aka akb akg akh akk akn akr an- ana anb ang anh ank ann anr ar- ara arb arg arh ark arn arr baa bab bag bah bak ban bar bba bbb bbg bbh bbk bbn bbr bga bgb bgg bgh bgk bgn bgr bha bhb bhg bhh bhk bhr bka bkb bkg bkk bkn bkr bna bnb bng bnk bnn bnr bra brb brg brh brk brn brr gaa gab gag gah gak gan gar gba gbg gbh gbk gbn gbr gga ggb ggg ggh ggn ggr gha ghb ghg ghh ghn ghr gka gkb gkh gkn gna gnb gnn gnr gra grb grg grh grk grn grr haa hab hag hah hak han har hba hbb hbg hbh hbk hbn hbr hga hgb hgg hgh hgk hgn hgr hha hhb hhg hhh hhk hhn hhr hka hkb hkg hkh hkk hkn hkr hna hnb hng hnh hnk hnn hr- hra hrb hrg hrh hrk hrn hrr ka- kaa kab kag kah kak kan kar kba kbb kbh kbk kbn kbr kga kgb kgh kha khh khk khn khr kkb kkh kkk kkn kkr kn- kna kng knk knn knr kra krg krk krn krr naa nab nag nah nak nan nar nba nbb nbg nbk nbn nbr nga ngb ngg ngh ngk ngn nha nhb nhg nhh nhk nhn nhr nka nkk nkn nkr nna nnb nng nnh nnk nnn nra nrb nrg nrk nrn nrr ra- raa rab rag rah rak ran rar rba rbb rbg rbh rbk rbn rbr rga rgb rgg rgh rgk rgn rgr rh- rha rhb rhg rhh rhn rhr rkb rkg rkk rna rnb rng rnh rnn rnr rra rrb rrg rrh rrk rrn rrr