aaaa aaae aaap aaea aaep aapa aapt aata aatt aeap aeta aett aetx apap apat apax apea apep apet apex appa appt appx apta apte aptt aptx at-t at-x ataa atae atap atat atax atea atee atep atex atta atte attp axat eapp eata eate eeea eeee eeta eete eext epaa epee eppa eppp epta epte epxp etap etat etee etta ette exa- expt exta exte paap paat paea paep papa pape papp pata pate patt peap peat peax peep peet pepa pepe peta pete pett ppap pppa pppp ppta pptt taa- taat tapa tape tapp tapt tata tate tatt tax- taxa taxe taxt teat teet tepa tepe tepp teta tete tett tetx texa text tpap tppa tppp tpte tptp tttt txaa xate xexe xpax xtea xtep xxxx