a-a a-c a-z aaa aac aak aao aap aar aaz ac- aca acc ack aco acp acr acz aka akc akk ako akp akr aoa aoc aok aoo aop aor ap- apa apc apk apo app apr ar- ara arc ark aro arp arr arz az- aza azo azp azz c-- caa cac cak cao cap car caz cca ccc cck cco ccp ccr ccz cka ckc cko co- coa coc cok coo cop cor coz cpa cpc cpk cpo cpp cpr cpz cra crc crk cro crp crr crz cz- czc czk czo k-z ka- kaa kac kak kao kap kar kaz kca kcc kck kcp kcr kkc kkk kkp kkr koa koc kok koo kop kor koz kpa kpc kpk kpo kpp kpr kra krc krk kro krp krr kzo oaa oac oak oao oap oar oc- oca occ ock oco ocp ocr ocz oka okc okk oko okp okr oo- ooa ooc ook ooo oop oor op- opa opc opk opo opp opr or- ora orc ork oro orp orr orz oza ozo ozz p-p paa pac pak pao pap par paz pca pcc pck pco pcp pcr pka pkc pko pkp pkr poa poc pok poo pop por poz ppa ppc ppk ppo ppp ppr ppz pra prc prk pro prp prr prz pzc pzk pzp ra- raa rac rak rao rap rar raz rca rcc rco rcp rcr rkc rkk rko rkp rkz roa roc rok roo rop ror roz rpa rpc rpk rpo rpp rpr rpz rra rrc rrk rrp rrr rza rzo zaa zac zak zao zap zar zaz zco zka zo- zoa zoc zok zoo zor zpc zpo zpp zpr zro zrp zzr zzz