a-ak aaaa aaac aaae aaap aaca aacc aace aack aacp aaea aaec aaep aaka aake aapa aapc acaa acac acae acap acca accc acce accp ace- acea acec acek acke acpa acpe aeac aeap aeka akaa akae akap akca akee akka apac apak apap apca apcc apea apec apep apke appa appc caaa caac caap cac- caca cacc cace cack caec caka cake capa capc cape capp ccaa ccac ccap ccca cccc cccp ccee ccpa ccpe ccpp ceac cec- ceca cece cecp ceec ceke cepa cepc cepe cepp ckac ckck ckpc cpaa cpac cpap cpca cpce cpea cpep cppa eaca eacc eaec eapc eapp ecaa ecac ecca eccc ecce ecka ecpa ecpp eeca eeea eeee eeka eeke eka- ekek ekka ekpe epaa epac epcc epec epee eppa eppc eppp kaaa kaak kaap kacc kace kacp kaep kaka kakc kake kakk kap- kapa kapc kape kapp kcaa kcac kcap kcca kccc kcck kcea kcec kcee kcep kckc kckk kcpa kcpc kea- keak keap keca keck keek keep keka kekc keke kep- kepa kepc kepe kkaa kkac kkap kkck kkea kkkk kkpc kkpk kpac kpae kpak kpcc kpek kpke kpkk kppc kppk kppp paak paap paca pace pack paea paec paep paka pake papa pape papp pcaa pcae pcap pcca pccc pcce pcea pcep pcpp peac peak peap peca pece peck peec peek peep peka peke pekk pepa pepe ppac ppap ppcc pppa pppp