a-a a-b a-i aaa aab aai aam aao aay ab- aba abb abi abm abo aby ai- aia aib aii aim aio aiy ama amb ami amm amo amy aoa aob aoi aom aoo ay- aya ayi ayo baa bab bai bam bao bay bba bbb bbi bbm bbo bby bi- bia bib bii bim bio biy bma bmb bmi bmm bmo boa bob boi bom boo boy by- bya byi bym byo ia- iaa iab iai iam iao iba ibb ibi ibm ibo iby iia iib iii iim iio im- ima imb imi imm imo imy io- ioa iob ioi iom ioo iya iym iyo iyy m-o maa mab mai mam mao may mba mbb mbi mbm mbo mi- mia mib mii mim mio miy mma mmb mmi mmm mmo moa mob moi mom moo moy my- mya myb mym myo o-i oaa oab oai oam oao ob- oba obb obi obm obo oby oia oib oii oim oio om- oma omb omi omm omo omy oo- ooa oob ooi oom ooo oya oyi oyo yaa yab yai yam yao yay ybi ybm yby yii yim yio yma ymi ymm ymo yob yoi yom yoo yoy yyb yyy