a-ak a-ya aaaa aaab aaac aaap aaba aabb aabc aabp aaby aaca aacb aacc aack aacp aacy aaka aapa aapc abaa abab abac abak abap abay abb- abba abbb abby abca abcb abcc abcp abpa abpc abpp abyc abyy acaa acab acac acap acba acca accc accp accy acpa akaa akap akay akca akka apac apak apap apay apba apca apcb apcc appa appc appy ayay ayca ayya baaa baak baba babb baby bac- baca bacc back bak- baka bapa bapc bapp baya bbay bbbb bcaa bcap bcbc bcbp bcca bccc bcpp bkcy bpay bpcp byck caaa caab caac caap caba caby cac- caca cacc cack caka caky capa capb capc capp capy cbac cbbc cbca cbcc cbcp cbka cbpc cbpp ccaa ccab ccac ccap ccba ccbc ccca cccb cccc cccp ccpa ccpp ckac ckbc ckck ckcy ckpc cpaa cpac cpap cpbc cpca cppa cya- cyaa cyba cybb cybc cyc- cyca cycb cycc cypa cypc cyy- cyyc kaaa kaab kaak kaap kaay kaba kabb kabc kaby kacb kacc kacp kacy kaka kakc kakk kap- kapa kapc kapp kaya kbaa kbab kbac kbak kbap kbay kbba kbbb kbbc kbbk kbca kbcb kbck kbcy kbkb kbkk kbky kbpa kbpc kbpk kbpy kbya kbyb kcaa kcab kcac kcap kcba kcbc kcbk kcca kccb kccc kcck kccy kckc kckk kcky kcpa kcpc kcya kcyk kcyy kkaa kkac kkap kkay kkba kkbb kkcb kkck kkcy kkkk kkpc kkpk kkya kkyc kkyy kpac kpak kpay kpba kpbb kpcc kpkk kpky kppc kppk kppp kpyk kyaa kyak kyap kyay kyba kybb kybc kybp kyby kyca kycc kyck kyka kykc kykk kyky kyp- kypa kypb kypc kyya kyyk kyyy paak paap paba paca pack pacy paka papa papb papp papy pay- paya payb payp pbac pbcc pbpa pbpk pcaa pcap pcba pcbc pcca pccc pcpb pcpp ppac ppap ppcc pppa pppp pyay pyck pykk pypy yaak yaba yacc yack yacp yacy yaka yapa yapp yaya ycab yccc ypcc yyyy