aaaa aaac aaae aaca aacc aace aact aaea aaec aata aatc aatt ac-t acaa acac acae acat acca accc acce acct ace- acea acec acet acta actc actt aeac aect aeta aetc aett at-t ataa atac atae atat atca atcc atea atec atee atta atte caaa caac caat cac- caca cacc cace caec cat- cata catc cate catt ccaa ccac ccat ccca cccc ccee cctc cctt ceac ceat cec- ceca cece cect ceec cet- ceta cete ctae ctca ctec ctta eaca eacc eaec eata eate ecaa ecac ecat ecca eccc ecce ecct ect- ecta ectc eeca eeea eeee eeta eetc eete etat etcc etec etee etta ette taa- taat taca tacc tace tact taec tata tate tatt tcca tccc tctc teac teat teca tect teec teet teta tete tett tttt