a-a a-c aaa aac aad aao aaw ac- aca acc acd aco acw ad- ada adc add ado adw aoa aoc aod aoo aow aw- awa awc awd awo aww c-- caa cac cad cao caw cca ccc ccd cco ccw cda cdc cdd cdo cdw co- coa coc cod coo cow cw- cwa cwc cwd cwo daa dac dad dao daw dca dcc dcd dco dcw dda ddc ddd ddo ddw doa doc dod doo dow dwa dwc dwo dww oaa oac oad oao oaw oc- oca occ ocd oco ocw oda odc odd odo oo- ooa ooc ood ooo oow owa owc owd owo oww waa wac wad wao waw wca wcc wcd wco wcw wda wdc woa woc wod woo wow wwa wwc wwd wwo www