a-a a-b aaa aab aad aao aaw aay ab- aba abb abd abo abw aby ad- ada adb add ado adw ady aoa aob aod aoo aow aw- awa awb awd awo aww awy ay- aya ayd ayo ayw baa bab bad bao baw bay bba bbb bbd bbo bbw bby bda bdb bdd bdo bdw bdy boa bob bod boo bow boy bwa bwb bwd bwo bwy by- bya byd byo daa dab dad dao daw day dba dbb dbd dbo dby dda ddb ddd ddo ddw ddy doa dob dod doo dow doy dwa dwb dwo dww dy- dya dyb dyd dyo dyw dyy oaa oab oad oao oaw ob- oba obb obd obo obw oby oda odb odd odo oo- ooa oob ood ooo oow owa owb owd owo oww oya oyd oyo waa wab wad wao waw way wba wbb wbd wbo wbw wda wdb wdy woa wob wod woo wow woy wwa wwd wwo www wy- wya wyd wyo yaa yab yad yao yaw yay yby yda ydo ydy yob yod yoo yow yoy yyb yyy