a-ak a-ok aaaa aaac aaap aaca aacc aack aaco aacp aaka aaoo aapa aapc aapo acaa acac acap acca accc acco accp acoa acop acpa akaa akao akap akca akka akko akok akpo aoca aokp aopo apac apak apao apap apca apcc apco apo- apoc apoo apop appa appc caaa caac caap cac- caca cacc cack caco caka capa capc capo capp ccaa ccac ccap ccca cccc cccp ccoc ccpa ccpp ckac ckck ckco ckoa ckoc ckoo ckpc coak coca cock coco cocp cok- coka coko cook coop copa copo copp cpaa cpac cpap cpca cppa kaaa kaak kaap kacc kaco kacp kaka kakc kakk kako kaoa kaoc kaok kap- kapa kapc kapo kapp kcaa kcac kcap kcca kccc kcck kckc kckk kcko kcpa kcpc kcpo kkaa kkac kkap kkck kkco kkkk kkoa kkoo kkpc kkpk koac koak koap koca kock kocp koka kokc kokk koko kokp kooc kook kooo koop kopa kopp kpac kpak kpao kpcc kpkk kpoa kpoc kpok kpoo kpop kppc kppk kppo kppp ocac ocak ocap occa occc ocpa ocpp okak okap okka okko okok okpo ooaa ooak oooo opap opca opo- oppa oppo paak paap paca pack paco paka pako paoc papa papp pcaa pcap pcca pccc pcoa pcpp poak poca pock poco poka poko pook poop pop- popa popc popo popp ppac ppap ppcc ppoa pppa pppo pppp