-th a-a a-b a-t aaa aab aah aao aar aat aay ab- aba abb abh abo abr abt aby aha ahb ahh aho ahr aht ahy aoa aob aoh aoo aor aot ar- ara arb arh aro arr art ary at- ata atb ath ato atr att ay- aya ayh ayo ayr ayt baa bab bah bao bar bat bay bba bbb bbh bbo bbr bbt bby bha bhb bhh bho bhr bht boa bob boh boo bor bot boy bra brb brh bro brr brt bry bta btb bth bto btr btt bty by- bya byh byo byr byt haa hab hah hao har hat hay hba hbb hbh hbo hbr hbt hby hha hhb hhh hho hhr hht hhy hoa hob hoh hoo hor hot hoy hr- hra hrb hrh hro hrr hrt hta htb hth hto htr htt hty hy- hya hyb hyh hyo hyr hyt hyy oaa oab oah oao oar oat ob- oba obb obh obo obr obt oby oha ohh oho ohr oht oo- ooa oob ooh ooo oor oot or- ora orb orh oro orr ort ory ot- ota otb oth oto otr ott oya oyo ra- raa rab rah rao rar rat ray rba rbb rbh rbo rbr rbt rh- rha rhb rhh rho rhr rht roa rob roh roo ror rot roy rra rrb rrh rrr rrt rta rtb rto rtr rtt rty ry- rya ryo ryr ryy taa tab tah tao tar tat tay tba tbb tbh tbo tbr tbt th- tha thb thh tho thr tht thy to- toa tob toh too tor tot toy tra trb trh tro trr trt try tta ttb tth tto ttr ttt tty tya tyo tyr tyt yaa yab yah yao yar yat yay ybr yby yha yht yob yoo yor yot yoy yra yro yrt yta yth yto ytr ytt yyb yyt yyy