-er -ol c-- ccc cce cck ccl cco ccr ccz ce- cec cee cek cel ceo cer cez ckc cko cl- clc cle clk cll clo clr clz co- coc coe cok col coo cor coz crc cre crk crl cro crr crz cz- czc cze czk czo ec- ecc ece eck ecl eco ecr eec eee eek eel eeo eer ekc eke ekl eko ekr elc ele elk ell elo elr elz eo- eoc eoe eok eol eoo eor erc ere erk erl ero err erz eze ezo ezr ezz k-z kcc kce kck kcl kcr ke- kec kee kek kel keo ker kez kkc kke kkk kkl kkr kl- klc klo klr klz koc koe kok kol koo kor koz krc krk krl kro krr kzo lcc lce lck lcl lco lcr lec lee lek lel leo ler lez lkl lkr llc lle llk lll llo llr llz loc loe lok lol loo lor loz lrc lrk lro lrr lrz lzo lzr oc- occ ock ocl oco ocr ocz oec oee oel oeo oer okc oke okk okl oko okr olc ole olk oll olo oo- ooc ook ool ooo oor or- orc ore ork orl oro orr orz oze ozo ozz rcc rce rcl rco rcr re- rec ree rek rel reo rer rez rkc rke rkk rko rkz rlc rle rll rlo rlr roc roe rok rol roo ror roz rrc rrk rrl rrr rze rzo zce zcl zco zec zee zek zel zeo zer zez zlr zo- zoc zoe zok zol zoo zor zrl zro zzr zzz