a-a a-b aaa aab aah aaj aan aao ab- aba abb abh abj abn abo aha ahb ahh ahj ahn aho aja ajb ajh ajj ajn ajo an- ana anb anh anj ann ano aoa aob aoh aoj aon aoo baa bab bah baj ban bao bba bbb bbh bbn bbo bha bhb bhh bhj bho bja bjj bjn bna bnb bnj bnn bno boa bob boh boj bon boo haa hab hah haj han hao hba hbb hbh hbj hbn hbo hha hhb hhh hhj hhn hho hja hjn hjo hna hnb hnh hnj hnn hno hoa hob hoh hon hoo jaa jab jah jaj jan jao jba jbj jbo jha jhj jhn jho jja jjb jjj jna jnh jnj jnn jno joa job joh joj jon joo naa nab nah naj nan nao nba nbb nbn nbo nha nhb nhh nhj nhn nja njn nna nnb nnh nnn nno no- noa nob noh noj non noo oaa oab oah oaj oan oao ob- oba obb obh obj obn obo oha ohh ohn oho oja ojb ojo on- ona onb onh onj onn ono oo- ooa oob ooh oon ooo