a-a a-b a-t aaa aab aak aao aat aaw ab- aba abb abk abo abt abw aka akb akk ako akw aoa aob aok aoo aot aow at- ata atb ato att atw aw- awa awb awk awo awt aww baa bab bak bao bat baw bba bbb bbk bbo bbt bbw bka bkb bkk bko bkt bkw boa bob bok boo bot bow bta btb btk bto btt btw bwa bwb bwk bwo k-t ka- kaa kab kak kao kat kaw kba kbb kbk kbo kbw kkb kkk kkt koa kob kok koo kot kow kta ktb ktk kto ktt ktw kw- kwa kwk kwo kwt kww oaa oab oak oao oat oaw ob- oba obb obk obo obt obw oka okb okk oko okw oo- ooa oob ook ooo oot oow ot- ota otb otk oto ott otw owa owb owk owo owt oww taa tab tak tao tat taw tba tbb tbk tbo tbt tka tkb tkk tko tkt tkw to- toa tob tok too tot tow tta ttb ttk tto ttt ttw twa twb two twt tww waa wab wak wao wat waw wba wbb wbo wbt wbw wka wkb wko wkt wkw woa wob wok woo wot wow wta wtb wto wtt wtw wwa wwo wwt www