-th a-a a-b a-t aaa aab aag aah aao aat aay ab- aba abb abg abh abo abt aby ag- aga agb agg agh ago agt agy aha ahb ahg ahh aho aht ahy aoa aob aog aoh aoo aot at- ata atb atg ath ato att ay- aya ayh ayo ayt baa bab bag bah bao bat bay bba bbb bbg bbh bbo bbt bby bga bgb bgg bgh bgo bgt bha bhb bhg bhh bho bht boa bob bog boh boo bot boy bta btb btg bth bto btt bty by- bya byg byh byo byt gaa gab gag gah gao gat gay gba gbg gbh gbo gbt gby gga ggb ggg ggh ggo ggt gha ghb ghg ghh gho ght goa gob gog goh goo got goy gta gtb gtg gth gto gtt gty gy- gya gyb gyo haa hab hag hah hao hat hay hba hbb hbg hbh hbo hbt hby hga hgb hgg hgh hgo hgt hgy hha hhb hhg hhh hho hht hhy hoa hob hog hoh hoo hot hoy hta htb htg hth hto htt hty hy- hya hyb hyg hyh hyo hyt hyy oaa oab oag oah oao oat ob- oba obb obg obh obo obt oby oga ogg ogh ogo ogt ogy oha ohg ohh oho oht oo- ooa oob oog ooh ooo oot ot- ota otb otg oth oto ott oya oyo taa tab tag tah tao tat tay tba tbb tbg tbh tbo tbt tga tgb tgg tgh tgo tgt tgy th- tha thb thg thh tho tht thy to- toa tob tog toh too tot toy tta ttb ttg tth tto ttt tty tya tyg tyo tyt yaa yab yag yah yao yat yay ybg yby yga ygo yha yht yob yog yoo yot yoy yta yth yto ytt yyb yyg yyt yyy