a-a a-b aaa aab aah aak aan aar ab- aba abb abh abk abn abr aha ahb ahh ahk ahn ahr aka akb akh akk akn akr an- ana anb anh ank ann anr ar- ara arb arh ark arn arr baa bab bah bak ban bar bba bbb bbh bbk bbn bbr bha bhb bhh bhk bhr bka bkb bkk bkn bkr bna bnb bnk bnn bnr bra brb brh brk brn brr haa hab hah hak han har hba hbb hbh hbk hbn hbr hha hhb hhh hhk hhn hhr hka hkb hkh hkk hkn hkr hna hnb hnh hnk hnn hr- hra hrb hrh hrk hrn hrr ka- kaa kab kah kak kan kar kba kbb kbh kbk kbn kbr kha khh khk khn khr kkb kkh kkk kkn kkr kn- kna knk knn knr kra krk krn krr naa nab nah nak nan nar nba nbb nbk nbn nbr nha nhb nhh nhk nhn nhr nka nkk nkn nkr nna nnb nnh nnk nnn nra nrb nrk nrn nrr ra- raa rab rah rak ran rar rba rbb rbh rbk rbn rbr rh- rha rhb rhh rhn rhr rkb rkk rna rnb rnh rnn rnr rra rrb rrh rrk rrn rrr