a-a a-b aaa aab aas aaw aay ab- aba abb abs abw aby as- asa asb ass asw asy aw- awa awb aws aww awy ay- aya ays ayw baa bab bas baw bay bba bbb bbs bbw bby bsa bsb bss bsw bsy bwa bwb bws bwy by- bya bys saa sab sas saw say sba sbb sbs sbw sby ss- ssa ssb sss ssw swa swb sws swy sy- sya syb sys waa wab was waw way wba wbb wbs wbw wsa wsb wss wsw wwa www wy- wya wys yaa yab yas yaw yay ybs yby ysa ysb yss ysy yyb yys yyy