a-a a-b a-t aaa aab aak aam aao aar aat aau ab- aba abb abk abm abo abr abt abu aka akb akk akm ako akr aku ama amb amk amm amo amr amt amu aoa aob aok aom aoo aor aot aou ar- ara arb ark arm aro arr art aru at- ata atb atm ato atr att atu au- aua aub auk aum auo aur aut b-u baa bab bak bam bao bar bat bau bba bbb bbk bbm bbo bbr bbt bbu bka bkb bkk bkm bko bkr bkt bma bmb bmk bmm bmo bmr bmt bmu boa bob bok bom boo bor bot bou bra brb brk brm bro brr brt bru bta btb btk btm bto btr btt btu bua bub buk bum buo bur but buu k-t ka- kaa kab kak kam kao kar kat kau kba kbb kbk kbm kbo kbr kbu kkb kkk kkm kkr kkt kku kma kmb kmk kmm kmo kmt kmu koa kob kok kom koo kor kot kou kra krk kro krr krt kru kta ktb ktk ktm kto ktr ktt ktu kub kuk kum kur kut kuu m-o m-r maa mab mak mam mao mar mat mau mba mbb mbk mbm mbo mbr mbt mbu mka mkb mkk mkm mko mkr mkt mku mma mmb mmk mmm mmo mmr mmt mmu moa mob mok mom moo mor mot mou mra mrb mrk mrm mro mrr mrt mru mta mtb mtk mtm mto mtr mtt mtu mua mub muk mum mur mut muu oaa oab oak oam oao oar oat oau ob- oba obb obk obm obo obr obt obu oka okb okk oko okr oku om- oma omb omm omo omr omt omu oo- ooa oob ook oom ooo oor oot or- ora orb ork orm oro orr ort oru ot- ota otb otk otm oto otr ott otu ou- oua ouk oum ouo our out ra- raa rab rak ram rao rar rat rau rba rbb rbk rbm rbo rbr rbt rbu rkb rkk rkm rko rkt rku rma rmb rmm rmo rmr rmt roa rob rok rom roo ror rot rou rra rrb rrk rrm rrr rrt rru rta rtb rtk rtm rto rtr rtt rtu rua rub ruk rum ruo rur rut ruu taa tab tak tam tao tar tat tau tba tbb tbk tbm tbo tbr tbt tbu tka tkb tkk tkm tko tkr tkt tma tmb tmk tmm tmo tmr tmt tmu to- toa tob tok tom too tor tot tou tra trb trk trm tro trr trt tru tta ttb ttk ttm tto ttr ttt ttu tua tub tuk tum tuo tur tut tuu ua- uaa uab uak uam uao uar uat uau uba ubb ubk ubo ubr ubt ubu uka ukb ukk ukr uku um- uma umb umm umo umr umt umu uoa uob uok uom uoo uor uot ur- ura urb urk urm uro urr urt uru uta utb utk utm uto utr utt utu uua uum uur uut uuu