-er c-- ccc cce cch ccn cco ccr ccs ce- cec cee ceh cen ceo cer ces ch- chc che chh chn cho chr chs cn- cnc cne cnh cnn cno cnr cns co- coc coe coh con coo cor cos crc cre crh crn cro crr crs csc cse csh csn cso csr css ec- ecc ece ech ecn eco ecr ecs eec eee een eeo eer ees ehc ehe ehh ehn eho ehr ehs en- enc ene enh enn eno enr ens eo- eoc eoe eoh eon eoo eor eos erc ere erh ern ero err ers es- esc ese esh esn eso esr ess hcc hce hch hcn hco hcr hcs he- hec hee heh hen heo her hes hhc hhe hhh hhn hho hhr hhs hnc hne hnh hnn hno hns hoc hoe hoh hon hoo hor hos hr- hrc hre hrh hrn hro hrr hrs hsc hse hsh hsn hsr hss ncc nce nch ncn nco ncr ncs ne- nec nee neh nen neo ner nes nhc nhe nhh nhn nhr nhs nnc nne nnh nnn nno nns no- noc noe noh non noo nor nos nrc nre nrn nro nrr nrs nsc nse nsh nsn nso nsr nss oc- occ och ocn oco ocr ocs oec oee oeh oen oeo oer oes ohc ohe ohh ohn oho ohr ohs on- onc one onh onn ono onr ons oo- ooc ooh oon ooo oor oos or- orc ore orh orn oro orr ors os- osc ose osh osn oso osr oss rcc rce rch rcn rco rcr rcs re- rec ree reh ren reo rer res rh- rhc rhe rhh rhn rho rhr rhs rnc rnh rnn rno rnr rns roc roe roh ron roo ror ros rrc rrh rrn rrr rrs rsc rse rsh rsn rso rsr rss scc sce sch scn sco scr scs se- sec see seh sen seo ser ses sh- shc she shh shn sho shr shs snc sne snn sno snr sns soc soe soh son soo sor sos sr- src sre srh srn sro srr srs ss- ssc sse ssh ssn sso ssr sss