aaaa aaac aaca aacc aaco aact aaoo aata aatc aatt ac-t acaa acac acat acca accc acco acct acoa acot acta actc acto actt aoca aotc at-t ataa atac atat atca atcc atco atoc atot atta atto caaa caac caat cac- caca cacc caco cat- cata catc cato catt ccaa ccac ccat ccca cccc ccoc cctc cctt coat coca coco coct coot cota cotc coto cott ctca ctot ctta ocac ocat occa occc occt oct- octa octo ooaa oooo otac oto- otoo otta otto taa- taat taca tacc taco tact taoa tata tato tatt tcca tccc tctc toat toca toco tooa toot tota totc toto tott tttt