-er -ey c-- ccc cce cch cco ccr ce- cec cee ceh ceo cer cey ch- chc che chh cho chr chy co- coc coe coh coo cor coy crc cre crh cro crr cry cyc cye cyo cyr ec- ecc ece ech eco ecr eec eee eeo eer eey ehc ehe ehh eho ehr eo- eoc eoe eoh eoo eor erc ere erh ero err ery eyc eye eyo eyr hcc hce hch hco hcr hcy he- hec hee heh heo her hey hhc hhe hhh hho hhr hhy hoc hoe hoh hoo hor hoy hr- hrc hre hrh hro hrr hy- hyc hye hyh hyo hyr hyy oc- occ och oco ocr oec oee oeh oeo oer oey ohc ohe ohh oho ohr oo- ooc ooh ooo oor or- orc ore orh oro orr ory oye oyo rcc rce rch rco rcr re- rec ree reh reo rer rey rh- rhc rhe rhh rho rhr roc roe roh roo ror roy rrc rrh rrr ry- ryc rye ryo ryr ryy ycc yce ych yco ycy yec yee yeh yeo yer yey yhc yhe yoc yoe yoo yor yoy yrc yre yro yyc yye yyy