-er -ic c-- ccc ccd cce cci cco ccp ccr ccs cdc cdd cde cdi cdo cdp cdr cds ce- cec ced cee cei ceo cep cer ces ci- cic cid cie cii cio cip cir cis co- coc cod coe coi coo cop cor cos cpc cpd cpe cpi cpo cpp cpr cps crc crd cre cri cro crp crr crs csc csd cse csi cso csp csr css dcc dcd dce dci dco dcp dcr dcs ddc ddd dde ddi ddo ddp ddr dds de- dec ded dee dei deo dep der des di- dic did die dii dio dip dir dis doc dod doe doi doo dop dor dos dpc dpd dpe dpi dpo dpp dpr dps drc drd dre dri dro drp drr drs dsc dsd dse dsi dso dsp dsr dss ec- ecc ecd ece eci eco ecr ecs ed- edc edd ede edi edo edp edr eds eec eed eee eeo eep eer ees eic eid eie eii eio eip eir eis eo- eoc eod eoe eoi eoo eop eor eos ep- epc epd epe epi epo epp epr eps erc erd ere eri ero erp err ers es- esc esd ese esi eso esp esr ess i-d icc icd ice ici ico icp icr ics idc idd ide idi ido idp idr ids ie- iec ied iee iei iep ier ies iic iid iie iii iio iip iir iis io- ioc iod ioe ioi ioo iop ior ios ipc ipd ipe ipi ipo ipp ipr ips ir- irc ird ire iri iro irp irr irs is- isc isd ise isi iso isp isr iss o-i oc- occ ocd oci oco ocp ocr ocs odc odd ode odi odo odp odr ods oec oed oee oei oeo oep oer oes oic oid oie oii oio oip oir ois oo- ooc ood ooi ooo oop oor oos op- opc opd ope opi opo opp opr ops or- orc ord ore ori oro orp orr ors os- osc osd ose osi oso osp osr oss p-p pcc pcd pce pci pco pcp pcr pcs pdc pdd pde pdi pdo pdp pdr pds pec ped pee pei peo pep per pes pic pid pie pii pio pip pir pis poc pod poe poi poo pop por pos ppc ppd ppe ppi ppo ppp ppr pps prc prd pre pri pro prp prr prs ps- psc psd pse psi pso psp psr pss rcc rcd rce rci rco rcp rcr rcs rdc rdd rde rdi rdo rdp rdr rds re- rec red ree rei reo rep rer res ric rid rie rii rio rip rir ris roc rod roe roi roo rop ror ros rpc rpd rpe rpi rpo rpp rpr rps rrc rrd rri rrp rrr rrs rsc rsd rse rsi rso rsp rsr rss scc scd sce sci sco scp scr scs sdc sdd sde sdi sdo sdp sdr sds se- sec sed see sei seo sep ser ses sic sid sie sii sio sip sir sis soc sod soe soi soo sop sor sos spc spd spe spi spo spp spr sps sr- src srd sre sri sro srp srr srs ss- ssc ssd sse ssi sso ssp ssr sss