a-a a-b aaa aab aad aah aan aar ab- aba abb abd abh abn abr ad- ada adb add adh adn adr aha ahb ahd ahh ahn ahr an- ana anb and anh ann anr ar- ara arb ard arh arn arr baa bab bad bah ban bar bba bbb bbd bbh bbn bbr bda bdb bdd bdh bdr bha bhb bhd bhh bhr bna bnb bnd bnn bnr bra brb brd brh brn brr daa dab dad dah dan dar dba dbb dbd dbh dbn dbr dda ddb ddd ddh ddn ddr dh- dha dhb dhd dhh dhr dna dnb dnd dnh dnn dnr dra drb drd drn drr haa hab had hah han har hba hbb hbd hbh hbn hbr hda hdb hdd hdh hdn hdr hha hhb hhd hhh hhn hhr hna hnb hnd hnh hnn hr- hra hrb hrd hrh hrn hrr naa nab nad nah nan nar nba nbb nbd nbn nbr nda ndb ndd ndh ndn ndr nha nhb nhd nhh nhn nhr nna nnb nnh nnn nra nrb nrd nrn nrr ra- raa rab rad rah ran rar rba rbb rbd rbh rbn rbr rda rdb rdd rdh rdn rdr rh- rha rhb rhd rhh rhn rhr rna rnb rnd rnh rnn rnr rra rrb rrd rrh rrn rrr