a-a a-c a-t aaa aac aao aat aaw ac- aca acc aco act acw aoa aoc aoo aot aow at- ata atc ato att atw aw- awa awc awo awt aww c-- caa cac cao cat caw cca ccc cco cct ccw co- coa coc coo cot cow cta ctc cto ctt ctw cw- cwa cwc cwo cwt oaa oac oao oat oaw oc- oca occ oco oct ocw oo- ooa ooc ooo oot oow ot- ota otc oto ott otw owa owc owo owt oww taa tac tao tat taw tca tcc tco tct tcw to- toa toc too tot tow tta ttc tto ttt ttw twa twc two twt tww waa wac wao wat waw wca wcc wco wct wcw woa woc woo wot wow wta wtc wto wtt wtw wwa wwc wwo wwt www