a-a a-c a-t aaa aac aao aat aaw aax ac- aca acc aco act acw acx aoa aoc aoo aot aow aox at- ata atc ato att atw atx aw- awa awc awo awt aww ax- axa axo axt axx c-- caa cac cao cat caw cax cca ccc cco cct ccw ccx co- coa coc coo cot cow cox cta ctc cto ctt ctw ctx cw- cwa cwc cwo cwt cxc cxo cxt cxx oaa oac oao oat oaw oax oc- oca occ oco oct ocw ocx oo- ooa ooc ooo oot oow oox ot- ota otc oto ott otw owa owc owo owt oww ox- oxa oxc oxo oxt oxx t-x taa tac tao tat taw tax tca tcc tco tct tcw tcx to- toa toc too tot tow tox tta ttc tto ttt ttw ttx twa twc two twt tww twx txt waa wac wao wat waw wax wca wcc wco wct wcw wcx woa woc woo wot wow wox wta wtc wto wtt wtw wtx wwa wwc wwo wwt www wxc wxw xaa xac xat xcx xoa xoc xoo xot xox xtc xtx xwa xwt xxo xxx