a-a a-b a-t aaa aab aag aam aao aat ab- aba abb abg abm abo abt ag- aga agb agg agm ago agt ama amb amg amm amo amt aoa aob aog aom aoo aot at- ata atb atg atm ato att baa bab bag bam bao bat bba bbb bbg bbm bbo bbt bga bgb bgg bgm bgo bgt bma bmb bmg bmm bmo bmt boa bob bog bom boo bot bta btb btg btm bto btt gaa gab gag gam gao gat gba gbg gbm gbo gbt gga ggb ggg ggm ggo ggt gma gmb gmg gmm gmo gmt goa gob gog gom goo got gta gtb gtg gtm gto gtt m-o maa mab mag mam mao mat mba mbb mbg mbm mbo mbt mga mgb mgm mgo mgt mma mmb mmg mmm mmo mmt moa mob mog mom moo mot mta mtb mtg mtm mto mtt oaa oab oag oam oao oat ob- oba obb obg obm obo obt oga ogg ogo ogt om- oma omb omg omm omo omt oo- ooa oob oog oom ooo oot ot- ota otb otg otm oto ott taa tab tag tam tao tat tba tbb tbg tbm tbo tbt tga tgb tgg tgm tgo tgt tma tmb tmg tmm tmo tmt to- toa tob tog tom too tot tta ttb ttg ttm tto ttt