a-a a-b aaa aab aag aak aam aar ab- aba abb abg abk abm abr ag- aga agb agg agk agm agr aka akb akg akk akm akr ama amb amg amk amm amr ar- ara arb arg ark arm arr baa bab bag bak bam bar bba bbb bbg bbk bbm bbr bga bgb bgg bgk bgm bgr bka bkb bkg bkk bkm bkr bma bmb bmg bmk bmm bmr bra brb brg brk brm brr gaa gab gag gak gam gar gba gbg gbk gbm gbr gga ggb ggg ggm ggr gka gkb gkm gma gmb gmg gmm gmr gra grb grg grk grm grr ka- kaa kab kag kak kam kar kba kbb kbk kbm kbr kga kgb kgm kkb kkk kkm kkr kma kmb kmg kmk kmm kra krg krk krr m-r maa mab mag mak mam mar mba mbb mbg mbk mbm mbr mga mgb mgk mgm mgr mka mkb mkg mkk mkm mkr mma mmb mmg mmk mmm mmr mra mrb mrg mrk mrm mrr ra- raa rab rag rak ram rar rba rbb rbg rbk rbm rbr rga rgb rgg rgk rgr rkb rkg rkk rkm rma rmb rmg rmm rmr rra rrb rrg rrk rrm rrr