-ey c-- ccc cce cck ccp ccz ce- cec cee cek cep cey cez ckc cky cpc cpe cpk cpp cpz cyc cye cyk cyp cz- czc cze czk ec- ecc ece eck eec eee eek eep eey ekc eke ekp eky ep- epc epe epp epz eyc eye eyp eze ezz k-z kcc kce kck kcp ke- kec kee kek kep key kez kkc kke kkk kkp kky kpc kpe kpk kpp kyc kye kyp kyz kzy p-p pcc pce pck pcp pec pee pek pep pey pez pkc pke pkp pky ppc ppe ppk ppp ppz py- pyc pye pyk pzc pzk pzp ycc yce ycp ycy yec yee yek yep yey yez ykk yyc yye yyy yyz yzy zce zec zee zek zep zez zpc zpe zpp zzy zzz