a-a a-b a-i a-t aaa aab aai aak aar aat aay ab- aba abb abi abk abr abt aby ai- aia aib aii aik air ait aiy aka akb aki akk akr ar- ara arb ari ark arr art ary at- ata atb ati atr att ay- aya ayi ayk ayr ayt baa bab bai bak bar bat bay bba bbb bbi bbk bbr bbt bby bi- bia bib bii bik bir bit biy bka bkb bkk bkr bkt bra brb bri brk brr brt bry bta btb bti btk btr btt bty by- bya byi byk byr byt ia- iaa iab iai iar iat iba ibb ibi ibk ibr ibt iby iia iib iii iir iit ika ikb iki ikk ikr ikt ir- ira irb iri irk irr irt iry ita itb iti itk itt ity iya iyr iyt iyy k-t ka- kaa kab kai kak kar kat kay kba kbb kbi kbk kbr kia kib kii kik kir kit kkb kki kkk kkr kkt kky kra kri krk krr krt kry kta ktb ktk ktr ktt kya kyr kyt ra- raa rab rai rak rar rat ray rba rbb rbi rbk rbr rbt ria rib rii rik rir rit riy rkb rkk rkt rky rra rrb rri rrk rrr rrt rta rtb rti rtk rtr rtt rty ry- rya ryk ryr ryy taa tab tai tak tar tat tay tba tbb tbi tbk tbr tbt tia tib tii tik tir tit tiy tka tkb tkk tkr tkt tky tra trb tri trk trr trt try tta ttb tti ttk ttr ttt tty tya tyr tyt yaa yab yai yak yar yat yay ybi ybr yby yii yir yit yka yki ykk yra yrt yta ytk ytr ytt yyb yyt yyy