a-a a-c a-z aaa aac aao aar aas aay aaz ac- aca acc aco acr acs acy acz aoa aoc aoo aor aos ar- ara arc aro arr ars ary arz as- asa asc aso asr ass asy asz ay- aya ayc ayo ayr ays ayz az- aza azo azs azy azz c-- caa cac cao car cas cay caz cca ccc cco ccr ccs ccz co- coa coc coo cor cos coy coz cra crc cro crr crs cry crz csa csc cso csr css csy csz cya cyc cyo cyr cys cz- czc czo oaa oac oao oar oas oc- oca occ oco ocr ocs ocz oo- ooa ooc ooo oor oos or- ora orc oro orr ors ory orz os- osa osc oso osr oss oya oyo oys oza ozo ozs ozz ra- raa rac rao rar ras ray raz rca rcc rco rcr rcs roa roc roo ror ros roy roz rra rrc rrr rrs rsa rsc rso rsr rss ry- rya ryc ryo ryr rys ryy ryz rza rzo rzy saa sac sao sar sas say saz sca scc sco scr scs soa soc soo sor sos soy soz sr- sra src sro srr srs sry ss- ssa ssc sso ssr sss ssz sy- sya syc syr sys sza szr yaa yac yao yar yas yay yaz yca ycc yco ycs ycy yoc yoo yor yos yoy yra yrc yro yrs ysa ysc yso ysr yss ysy ysz yyc yys yyy yyz yzr yzy zaa zac zao zar zas zay zaz zco zcs zo- zoa zoc zoo zor zos zro zrs zsa zsz zzr zzs zzy zzz