a-a a-b a-t aaa aab aag aao aat aaw ab- aba abb abg abo abt abw ag- aga agb agg ago agt agw aoa aob aog aoo aot aow at- ata atb atg ato att atw aw- awa awb awg awo awt aww baa bab bag bao bat baw bba bbb bbg bbo bbt bbw bga bgb bgg bgo bgt bgw boa bob bog boo bot bow bta btb btg bto btt btw bwa bwb bwg bwo gaa gab gag gao gat gaw gba gbg gbo gbt gbw gga ggb ggg ggo ggt ggw goa gob gog goo got gow gta gtb gtg gto gtt gtw gwa gwb gwg gwt oaa oab oag oao oat oaw ob- oba obb obg obo obt obw oga ogg ogo ogt oo- ooa oob oog ooo oot oow ot- ota otb otg oto ott otw owa owb owo owt oww taa tab tag tao tat taw tba tbb tbg tbo tbt tga tgb tgg tgo tgt to- toa tob tog too tot tow tta ttb ttg tto ttt ttw twa twb twg two twt tww waa wab wag wao wat waw wba wbb wbg wbo wbt wbw wga wgb wgo wgt wgw woa wob wog woo wot wow wta wtb wto wtt wtw wwa wwo wwt www