cccc cccf ccee ccfc ccff ccoc cctc cctt cec- cece ceco cect ceec cef- cefc cet- cete ceto cfcf cfco cftc cfte coce coco coct cofc cofe coff coft coof coot cotc cote coto cott ctcf ctec ctfc ctfo ctot eccc ecce ecco ecct ecef ecfc eco- ecot ect- ectc ectf ecto eeee eefe eeoc eetc eete efco efeo efet eft- eotc eoto etcc etco etec etee etfc etfe etoe ette etto fccf fcot fcto fece fect feet fefc fefe feff fefo feof fete fett ffcc ffee ffff fftf foce foco fofo foof foot fote foto fott ft-c ftfc o-eo occc occt oce ocee ocef ocet oct- octe octo oec- oecc oeec off- offc offe offo ooff oooo otee otfc oto- otoe otof otoo otte otto tccc tcfc tctc teco tect teec teef teet tefc teff teft tete teto tett tfec tfot tftc toce toco toee toet toff tofo toft toof toot totc tote toto tott tteo ttfc ttff ttoe tttt