a-a a-b aaa aab aad aah aak aan aar ab- aba abb abd abh abk abn abr ad- ada adb add adh adk adn adr aha ahb ahd ahh ahk ahn ahr aka akb akd akh akk akn akr an- ana anb and anh ank ann anr ar- ara arb ard arh ark arn arr baa bab bad bah bak ban bar bba bbb bbd bbh bbk bbn bbr bda bdb bdd bdh bdk bdr bha bhb bhd bhh bhk bhr bka bkb bkk bkn bkr bna bnb bnd bnk bnn bnr bra brb brd brh brk brn brr daa dab dad dah dak dan dar dba dbb dbd dbh dbk dbn dbr dda ddb ddd ddh ddk ddn ddr dh- dha dhb dhd dhh dhk dhr dka dkb dkk dkr dna dnb dnd dnh dnk dnn dnr dra drb drd drk drn drr haa hab had hah hak han har hba hbb hbd hbh hbk hbn hbr hda hdb hdd hdh hdk hdn hdr hha hhb hhd hhh hhk hhn hhr hka hkb hkd hkh hkk hkn hkr hna hnb hnd hnh hnk hnn hr- hra hrb hrd hrh hrk hrn hrr ka- kaa kab kad kah kak kan kar kba kbb kbd kbh kbk kbn kbr kda kdb kdh kdk kdr kha khh khk khn khr kkb kkh kkk kkn kkr kn- kna knd knk knn knr kra krd krk krn krr naa nab nad nah nak nan nar nba nbb nbd nbk nbn nbr nda ndb ndd ndh ndk ndn ndr nha nhb nhd nhh nhk nhn nhr nka nkk nkn nkr nna nnb nnh nnk nnn nra nrb nrd nrk nrn nrr ra- raa rab rad rah rak ran rar rba rbb rbd rbh rbk rbn rbr rda rdb rdd rdh rdn rdr rh- rha rhb rhd rhh rhn rhr rkb rkk rna rnb rnd rnh rnn rnr rra rrb rrd rrh rrk rrn rrr