a-a a-b aaa aab aak aao aaw aay ab- aba abb abk abo abw aby aka akb akk ako akw aoa aob aok aoo aow aw- awa awb awk awo aww awy ay- aya ayk ayo ayw baa bab bak bao baw bay bba bbb bbk bbo bbw bby bka bkb bkk bko bkw boa bob bok boo bow boy bwa bwb bwk bwo bwy by- bya byk byo ka- kaa kab kak kao kaw kay kba kbb kbk kbo kbw kkb kkk kky koa kob kok koo kow koy kw- kwa kwk kwo kww kya kyo kyw oaa oab oak oao oaw ob- oba obb obk obo obw oby oka okb okk oko okw oo- ooa oob ook ooo oow owa owb owk owo oww oya oyo waa wab wak wao waw way wba wbb wbo wbw wka wkb wko wkw wky woa wob wok woo wow woy wwa wwo www wy- wya wyk wyo yaa yab yak yao yaw yay yby yka ykk yob yok yoo yow yoy yyb yyy