a-a a-b a-t aaa aab aak aao aar aat aau aay ab- aba abb abk abo abr abt abu aby aka akb akk ako akr aku aoa aob aok aoo aor aot aou ar- ara arb ark aro arr art aru ary at- ata atb ato atr att atu au- aua aub auk auo aur aut ay- aya ayk ayo ayr ayt ayu b-u baa bab bak bao bar bat bau bay bba bbb bbk bbo bbr bbt bbu bby bka bkb bkk bko bkr bkt boa bob bok boo bor bot bou boy bra brb brk bro brr brt bru bry bta btb btk bto btr btt btu bty bua bub buk buo bur but buu buy by- bya byk byo byr byt byu k-t ka- kaa kab kak kao kar kat kau kay kba kbb kbk kbo kbr kbu kkb kkk kkr kkt kku kky koa kob kok koo kor kot kou koy kra krk kro krr krt kru kry kta ktb ktk kto ktr ktt ktu kub kuk kur kut kuu kuy kya kyo kyr kyt kyu oaa oab oak oao oar oat oau ob- oba obb obk obo obr obt obu oby oka okb okk oko okr oku oo- ooa oob ook ooo oor oot or- ora orb ork oro orr ort oru ory ot- ota otb otk oto otr ott otu ou- oua ouk ouo our out oya oyo ra- raa rab rak rao rar rat rau ray rba rbb rbk rbo rbr rbt rbu rkb rkk rko rkt rku rky roa rob rok roo ror rot rou roy rra rrb rrk rrr rrt rru rta rtb rtk rto rtr rtt rtu rty rua rub ruk ruo rur rut ruu ruy ry- rya ryk ryo ryr ryu ryy taa tab tak tao tar tat tau tay tba tbb tbk tbo tbr tbt tbu tka tkb tkk tko tkr tkt tky to- toa tob tok too tor tot tou toy tra trb trk tro trr trt tru try tta ttb ttk tto ttr ttt ttu tty tua tub tuk tuo tur tut tuu tuy tya tyo tyr tyt ua- uaa uab uak uao uar uat uau uay uba ubb ubk ubo ubr ubt ubu uby uka ukb ukk ukr uku uoa uob uok uoo uor uot ur- ura urb urk uro urr urt uru ury uta utb utk uto utr utt utu uty uua uur uut uuu uyo uyu yaa yab yak yao yar yat yau yay ybr yby yka ykk yob yok yoo yor yot you yoy yra yro yrt yru yta ytk yto ytr ytt ytu yua yuk yuo yur yut yuu yuy yyb yyt yyu yyy