a-a a-b aaa aab aad aak aam aar ab- aba abb abd abk abm abr ad- ada adb add adk adm adr aka akb akd akk akm akr ama amb amd amk amm amr ar- ara arb ard ark arm arr baa bab bad bak bam bar bba bbb bbd bbk bbm bbr bda bdb bdd bdk bdm bdr bka bkb bkk bkm bkr bma bmb bmd bmk bmm bmr bra brb brd brk brm brr daa dab dad dak dam dar dba dbb dbd dbk dbm dbr dda ddb ddd ddk ddm ddr dka dkb dkk dkm dkr dma dmb dmd dmk dmm dmr dra drb drd drk drm drr ka- kaa kab kad kak kam kar kba kbb kbd kbk kbm kbr kda kdb kdk kdm kdr kkb kkk kkm kkr kma kmb kmd kmk kmm kra krd krk krr m-r maa mab mad mak mam mar mba mbb mbd mbk mbm mbr mda mdb mdd mdk mdm mdr mka mkb mkd mkk mkm mkr mma mmb mmd mmk mmm mmr mra mrb mrd mrk mrm mrr ra- raa rab rad rak ram rar rba rbb rbd rbk rbm rbr rda rdb rdd rdm rdr rkb rkk rkm rma rmb rmd rmm rmr rra rrb rrd rrk rrm rrr