a-a a-b aaa aab aad aak aam aar aau ab- aba abb abd abk abm abr abu ad- ada adb add adk adm adr adu aka akb akd akk akm akr aku ama amb amd amk amm amr amu ar- ara arb ard ark arm arr aru au- aua aub aud auk aum aur b-u baa bab bad bak bam bar bau bba bbb bbd bbk bbm bbr bbu bda bdb bdd bdk bdm bdr bdu bka bkb bkk bkm bkr bma bmb bmd bmk bmm bmr bmu bra brb brd brk brm brr bru bua bub bud buk bum bur buu daa dab dad dak dam dar dau dba dbb dbd dbk dbm dbr dbu dda ddb ddd ddk ddm ddr ddu dka dkb dkk dkm dkr dku dma dmb dmd dmk dmm dmr dmu dra drb drd drk drm drr dru dua dub dud duk dum dur ka- kaa kab kad kak kam kar kau kba kbb kbd kbk kbm kbr kbu kda kdb kdk kdm kdr kdu kkb kkk kkm kkr kku kma kmb kmd kmk kmm kmu kra krd krk krr kru kub kud kuk kum kur kuu m-r maa mab mad mak mam mar mau mba mbb mbd mbk mbm mbr mbu mda mdb mdd mdk mdm mdr mdu mka mkb mkd mkk mkm mkr mku mma mmb mmd mmk mmm mmr mmu mra mrb mrd mrk mrm mrr mru mua mub mud muk mum mur muu ra- raa rab rad rak ram rar rau rba rbb rbd rbk rbm rbr rbu rda rdb rdd rdm rdr rdu rkb rkk rkm rku rma rmb rmd rmm rmr rra rrb rrd rrk rrm rrr rru rua rub rud ruk rum rur ruu ua- uaa uab uad uak uam uar uau uba ubb ubk ubr ubu uda udb udd udk udm udr udu uka ukb ukk ukr uku um- uma umb umd umm umr umu ur- ura urb urd urk urm urr uru uua uum uur uuu