a-a a-c a-z aaa aac aao aap aar aay aaz ac- aca acc aco acp acr acy acz aoa aoc aoo aop aor ap- apa apc apo app apr apy ar- ara arc aro arp arr ary arz ay- aya ayc ayo ayp ayr ayz az- aza azo azp azy azz c-- caa cac cao cap car cay caz cca ccc cco ccp ccr ccz co- coa coc coo cop cor coy coz cpa cpc cpo cpp cpr cpz cra crc cro crp crr cry crz cya cyc cyo cyp cyr cz- czc czo oaa oac oao oap oar oc- oca occ oco ocp ocr ocz oo- ooa ooc ooo oop oor op- opa opc opo opp opr opy or- ora orc oro orp orr ory orz oya oyo oza ozo ozz p-p paa pac pao pap par pay paz pca pcc pco pcp pcr poa poc poo pop por poy poz ppa ppc ppo ppp ppr ppz pra prc pro prp prr pry prz py- pya pyc pyo pyr pzc pzp ra- raa rac rao rap rar ray raz rca rcc rco rcp rcr roa roc roo rop ror roy roz rpa rpc rpo rpp rpr rpz rra rrc rrp rrr ry- rya ryc ryo ryr ryy ryz rza rzo rzy yaa yac yao yap yar yay yaz yca ycc yco ycp ycy yoc yoo yop yor yoy ypa ypo yra yrc yro yrp yyc yyy yyz yzr yzy zaa zac zao zap zar zay zaz zco zo- zoa zoc zoo zor zpc zpo zpp zpr zro zrp zzr zzy zzz