a-fu aaaa aaac aaaf aaca aacc aacf aaco aact aacu aafa aafc aaff aaoo aata aatc aatf aatt ac-t acaa acac acat acca accc accf acco acct accu acfc acft acoa acot acou acta actc actf acto actt actu acu- acuf acuo acut afaa afao afat afca afcc afcu affa affc affo afft afoa afoo afta aftc afua aoca aotc aotf aouf aout at-t ataa atac atat atca atcc atcf atco atfc atoc atof atot atta atto attu atua atuc auaa auca auct aufc aut- auto caaa caac caaf caat cac- caca cacc caco cafa cafc caff cafu cat- cata catc catf cato catt catu cauc cauf cauo caut ccaa ccac ccaf ccat ccca cccc cccf cccu ccfa ccfc ccff ccoc cctc cctt ccuc ccut cfaa cfac cfao cfca cfcf cfco cfoa cfta cftc coat coca coco coct cocu cofc coff coft coof coot cota cotc coto cott cotu coua cout ctca ctcf ctfc ctfo ctot ctta cuau cuca cucc cufa cufc cuff cufo cut- cuta cutc cuto cutt faaa faac faca facc fact fafa fafc faff fafo fata fatc fatf fato fatt faut fcat fcca fccf fcot fcto ffcc ffff fftf foaf foca foco fofo foof foot fota foto fott foua fout ft-c ftfc ftuc fuat fuc- fuca fuct fufc fuff fufu futa futo futu oaau oafc oafo ocac ocat occa occc occt ocfa oct- octa octo off- offa offc offo offu ofta ooaa ooff oooo otac otfc oto- otof otoo otta otto ottu ouac ouat oucc oufc ouff out- outa outo ouu- taa- taaf taat taca tacc taco tact tafa tafc taff tafo taft taoa taou tata tato tatt tatu taua tauc taut tcca tccc tccu tcfc tctc tfca tfcu tfot tftc toat toau toca toco tofa toff tofo toft tofu tooa toof toot tota totc toto tott tout ttfa ttfc ttff tttt tuao tuat tuca tucc tuco tufa tufc tuff tufo tuft tufu tuta tuto tutt tutu tuuo uaca uafa uaoc uata uatu uaua ucat ucca ucfa ucua ucut ufcu uffa uocc uofa uofo utac utau utfo utto uttu uuoc uuta uutf uuuu