a-a a-c a-z aaa aac aap aas aay aaz ac- aca acc acp acs acy acz ap- apa apc app aps apy as- asa asc asp ass asy asz ay- aya ayc ayp ays ayz az- aza azp azs azy azz c-- caa cac cap cas cay caz cca ccc ccp ccs ccz cpa cpc cpp cps cpz csa csc csp css csy csz cya cyc cyp cys cz- czc p-p paa pac pap pas pay paz pca pcc pcp pcs ppa ppc ppp pps ppz ps- psa psc psp pss psy py- pya pyc pys pzc pzp saa sac sap sas say saz sca scc scp scs spa spc spp sps spy spz ss- ssa ssc ssp sss ssz sy- sya syc syp sys sza szp yaa yac yap yas yay yaz yca ycc ycp ycs ycy ypa yps ysa ysc ysp yss ysy ysz yyc yys yyy yyz yzy zaa zac zap zas zay zaz zcs zpc zpp zsa zsz zzs zzy zzz