a-a a-b a-t aaa aab aak aar aat aau aay ab- aba abb abk abr abt abu aby aka akb akk akr aku ar- ara arb ark arr art aru ary at- ata atb atr att atu au- aua aub auk aur aut ay- aya ayk ayr ayt ayu b-u baa bab bak bar bat bau bay bba bbb bbk bbr bbt bbu bby bka bkb bkk bkr bkt bra brb brk brr brt bru bry bta btb btk btr btt btu bty bua bub buk bur but buu buy by- bya byk byr byt byu k-t ka- kaa kab kak kar kat kau kay kba kbb kbk kbr kbu kkb kkk kkr kkt kku kky kra krk krr krt kru kry kta ktb ktk ktr ktt ktu kub kuk kur kut kuu kuy kya kyr kyt kyu ra- raa rab rak rar rat rau ray rba rbb rbk rbr rbt rbu rkb rkk rkt rku rky rra rrb rrk rrr rrt rru rta rtb rtk rtr rtt rtu rty rua rub ruk rur rut ruu ruy ry- rya ryk ryr ryu ryy taa tab tak tar tat tau tay tba tbb tbk tbr tbt tbu tka tkb tkk tkr tkt tky tra trb trk trr trt tru try tta ttb ttk ttr ttt ttu tty tua tub tuk tur tut tuu tuy tya tyr tyt ua- uaa uab uak uar uat uau uay uba ubb ubk ubr ubt ubu uby uka ukb ukk ukr uku ur- ura urb urk urr urt uru ury uta utb utk utr utt utu uty uua uur uut uuu uyu yaa yab yak yar yat yau yay ybr yby yka ykk yra yrt yru yta ytk ytr ytt ytu yua yuk yur yut yuu yuy yyb yyt yyu yyy