a-a a-c aaa aac aan aao aaw ac- aca acc acn aco acw an- ana anc ann ano aoa aoc aon aoo aow aw- awa awc awn awo aww c-- caa cac can cao caw cca ccc ccn cco ccw cn- cna cnc cnn cno cnw co- coa coc con coo cow cw- cwa cwc cwn cwo naa nac nan nao naw nca ncc ncn nco ncw nna nnc nnn nno nnw no- noa noc non noo now nwa nwc nwn nwo oaa oac oan oao oaw oc- oca occ ocn oco ocw on- ona onc onn ono oo- ooa ooc oon ooo oow owa owc own owo oww waa wac wan wao waw wca wcc wcn wco wcw wn- wna wnc wnn wno wnw woa woc won woo wow wwa wwc wwn wwo www