a-a a-b a-t aaa aab aak aam aar aat aau ab- aba abb abk abm abr abt abu aka akb akk akm akr aku ama amb amk amm amr amt amu ar- ara arb ark arm arr art aru at- ata atb atm atr att atu au- aua aub auk aum aur aut b-u baa bab bak bam bar bat bau bba bbb bbk bbm bbr bbt bbu bka bkb bkk bkm bkr bkt bma bmb bmk bmm bmr bmt bmu bra brb brk brm brr brt bru bta btb btk btm btr btt btu bua bub buk bum bur but buu k-t ka- kaa kab kak kam kar kat kau kba kbb kbk kbm kbr kbu kkb kkk kkm kkr kkt kku kma kmb kmk kmm kmt kmu kra krk krr krt kru kta ktb ktk ktm ktr ktt ktu kub kuk kum kur kut kuu m-r maa mab mak mam mar mat mau mba mbb mbk mbm mbr mbt mbu mka mkb mkk mkm mkr mkt mku mma mmb mmk mmm mmr mmt mmu mra mrb mrk mrm mrr mrt mru mta mtb mtk mtm mtr mtt mtu mua mub muk mum mur mut muu ra- raa rab rak ram rar rat rau rba rbb rbk rbm rbr rbt rbu rkb rkk rkm rkt rku rma rmb rmm rmr rmt rra rrb rrk rrm rrr rrt rru rta rtb rtk rtm rtr rtt rtu rua rub ruk rum rur rut ruu taa tab tak tam tar tat tau tba tbb tbk tbm tbr tbt tbu tka tkb tkk tkm tkr tkt tma tmb tmk tmm tmr tmt tmu tra trb trk trm trr trt tru tta ttb ttk ttm ttr ttt ttu tua tub tuk tum tur tut tuu ua- uaa uab uak uam uar uat uau uba ubb ubk ubr ubt ubu uka ukb ukk ukr uku um- uma umb umm umr umt umu ur- ura urb urk urm urr urt uru uta utb utk utm utr utt utu uua uum uur uut uuu