a-a a-b a-q aaa aab aao aaq aau aay ab- aba abb abo abq abu aby aoa aob aoo aou aqa aqo au- aua aub auo ay- aya ayo ayu b-u baa bab bao baq bau bay bba bbb bbo bbq bbu bby boa bob boo boq bou boy bua bub buo buu buy by- bya byo byq byu oaa oab oao oaq oau ob- oba obb obo obu oby oo- ooa oob ooo oqb oqo ou- oua ouo oya oyo qaa qau qba qbq qoo qqq qqu qu- qua quo quy ua- uaa uab uao uaq uau uay uba ubb ubo ubu uby uoa uob uoo uua uuu uyo uyu yaa yab yao yau yay yby yob yoo you yoy yqb yua yuo yuu yuy yyb yyu yyy