a-a a-b aaa aab aag aam aao aay ab- aba abb abg abm abo aby ag- aga agb agg agm ago agy ama amb amg amm amo amy aoa aob aog aom aoo ay- aya ayo baa bab bag bam bao bay bba bbb bbg bbm bbo bby bga bgb bgg bgm bgo bma bmb bmg bmm bmo boa bob bog bom boo boy by- bya byg bym byo gaa gab gag gam gao gay gba gbg gbm gbo gby gga ggb ggg ggm ggo gma gmb gmg gmm gmo gmy goa gob gog gom goo goy gy- gya gyb gym gyo m-o maa mab mag mam mao may mba mbb mbg mbm mbo mga mgb mgm mgo mgy mma mmb mmg mmm mmo moa mob mog mom moo moy my- mya myb myg mym myo oaa oab oag oam oao ob- oba obb obg obm obo oby oga ogg ogo ogy om- oma omb omg omm omo omy oo- ooa oob oog oom ooo oya oyo yaa yab yag yam yao yay ybg ybm yby yga ygm ygo yma ymg ymm ymo yob yog yom yoo yoy yyb yyg yyy