a-a a-b aaa aab aag aah aan aao aay ab- aba abb abg abh abn abo aby ag- aga agb agg agh agn ago agy aha ahb ahg ahh ahn aho ahy an- ana anb ang anh ann ano any aoa aob aog aoh aon aoo ay- aya ayh ayn ayo baa bab bag bah ban bao bay bba bbb bbg bbh bbn bbo bby bga bgb bgg bgh bgn bgo bha bhb bhg bhh bho bna bnb bng bnn bno boa bob bog boh bon boo boy by- bya byg byh byn byo gaa gab gag gah gan gao gay gba gbg gbh gbn gbo gby gga ggb ggg ggh ggn ggo gha ghb ghg ghh ghn gho gna gnb gnn gno goa gob gog goh gon goo goy gy- gya gyb gyn gyo haa hab hag hah han hao hay hba hbb hbg hbh hbn hbo hby hga hgb hgg hgh hgn hgo hgy hha hhb hhg hhh hhn hho hhy hna hnb hng hnh hnn hno hny hoa hob hog hoh hon hoo hoy hy- hya hyb hyg hyh hyn hyo hyy naa nab nag nah nan nao nay nba nbb nbg nbn nbo nga ngb ngg ngh ngn ngo nha nhb nhg nhh nhn nhy nna nnb nng nnh nnn nno no- noa nob nog noh non noo noy nya nyg nyn nyo nyy oaa oab oag oah oan oao ob- oba obb obg obh obn obo oby oga ogg ogh ogn ogo ogy oha ohg ohh ohn oho on- ona onb ong onh onn ono ony oo- ooa oob oog ooh oon ooo oya oyo yaa yab yag yah yan yao yay ybg yby yga ygo yha yna yng ynn yny yob yog yon yoo yoy yyb yyg yyy