-er c-- ccc cce cch cco ccr ccz ce- cec cee ceh ceo cer cez ch- chc che chh cho chr chz co- coc coe coh coo cor coz crc cre crh cro crr crz cz- czc cze czo ec- ecc ece ech eco ecr eec eee eeo eer ehc ehe ehh eho ehr eo- eoc eoe eoh eoo eor erc ere erh ero err erz eze ezh ezo ezr ezz hcc hce hch hco hcr he- hec hee heh heo her hez hhc hhe hhh hho hhr hhz hoc hoe hoh hoo hor hr- hrc hre hrh hro hrr hrz hze hzo oc- occ och oco ocr ocz oec oee oeh oeo oer ohc ohe ohh oho ohr oo- ooc ooh ooo oor or- orc ore orh oro orr orz oze ozo ozz rcc rce rch rco rcr re- rec ree reh reo rer rez rh- rhc rhe rhh rho rhr roc roe roh roo ror roz rrc rrh rrr rze rzo zce zco zec zee zeh zeo zer zez zhc zhe zho zhr zo- zoc zoe zoo zor zrh zro zzr zzz