-er -ey c-- ccc cce ccf cco ccp ccr ccs ce- cec cee cef ceo cep cer ces cey cfc cfe cff cfo cfp cfr cfs co- coc coe cof coo cop cor cos coy cpc cpe cpf cpo cpp cpr cps crc cre crf cro crp crr crs cry csc cse csf cso csp csr css csy cyc cye cyf cyo cyp cyr cys ec- ecc ece ecf eco ecr ecs eec eee eef eeo eep eer ees eey ef- efc efe eff efo efp efr efs eo- eoc eoe eof eoo eop eor eos ep- epc epe epf epo epp epr eps erc ere erf ero erp err ers ery es- esc ese esf eso esp esr ess esy eyc eye eyo eyp eyr eys fcc fce fcf fco fcp fcr fcs fcy fec fee fef feo fep fer fes fey ffc ffe fff ffo ffp ffr ffs ffy foc foe fof foo fop for fos foy fpc fpe fpo fpp fpr fps fpy frc fre frf fro frp frr frs fry fsc fse fsf fso fsp fsr fss fy- fyc fye fyo fyp oc- occ ocf oco ocp ocr ocs oec oee oef oeo oep oer oes oey of- ofc ofe off ofo ofp ofr ofs oo- ooc oof ooo oop oor oos op- opc ope opf opo opp opr ops opy or- orc ore orf oro orp orr ors ory os- osc ose osf oso osp osr oss oye oyo oys p-p pcc pce pcf pco pcp pcr pcs pec pee pef peo pep per pes pey pfc pfe pff pfo pfp pfr pfs pfy poc poe pof poo pop por pos poy ppc ppe ppf ppo ppp ppr pps prc pre prf pro prp prr prs pry ps- psc pse psf pso psp psr pss psy py- pyc pye pyf pyo pyr pys rcc rce rcf rco rcp rcr rcs re- rec ree ref reo rep rer res rey rfc rfe rff rfo rfp rfr rfs roc roe rof roo rop ror ros roy rpc rpe rpf rpo rpp rpr rps rrc rrf rrp rrr rrs rsc rse rsf rso rsp rsr rss ry- ryc rye ryf ryo ryr rys ryy scc sce scf sco scp scr scs se- sec see sef seo sep ser ses sey sfc sfe sff sfo sfp sfr sfs soc soe sof soo sop sor sos soy spc spe spf spo spp spr sps spy sr- src sre srf sro srp srr srs sry ss- ssc sse ssf sso ssp ssr sss sy- syc sye syp syr sys ycc yce ycf yco ycp ycs ycy yec yee yef yeo yep yer yes yey yfc yfe yff yfr yfs yoc yoe yof yoo yop yor yos yoy ypf ypo yps yrc yre yrf yro yrp yrs ysc yse yso ysp ysr yss ysy yyc yye yyf yys yyy