-er -ic c-- ccc ccd cce cci ccp ccr ccs cct cdc cdd cde cdi cdp cdr cds cdt ce- cec ced cee cei cep cer ces cet ci- cic cid cie cii cip cir cis cit cpc cpd cpe cpi cpp cpr cps cpt crc crd cre cri crp crr crs crt csc csd cse csi csp csr css cst ctc ctd cte cti ctp ctr cts ctt dcc dcd dce dci dcp dcr dcs dct ddc ddd dde ddi ddp ddr dds ddt de- dec ded dee dei dep der des det di- dic did die dii dip dir dis dit dpc dpd dpe dpi dpp dpr dps dpt drc drd dre dri drp drr drs drt dsc dsd dse dsi dsp dsr dss dst dtc dtd dte dti dtp dtr dts dtt ec- ecc ecd ece eci ecr ecs ect ed- edc edd ede edi edp edr eds edt eec eed eee eep eer ees eet eic eid eie eii eip eir eis eit ep- epc epd epe epi epp epr eps ept erc erd ere eri erp err ers ert es- esc esd ese esi esp esr ess est etc etd ete eti etp etr ets ett i-d icc icd ice ici icp icr ics ict idc idd ide idi idp idr ids idt ie- iec ied iee iei iep ier ies iet iic iid iie iii iip iir iis iit ipc ipd ipe ipi ipp ipr ips ipt ir- irc ird ire iri irp irr irs irt is- isc isd ise isi isp isr iss ist itc itd ite iti itp its itt p-p pcc pcd pce pci pcp pcr pcs pct pdc pdd pde pdi pdp pdr pds pdt pec ped pee pei pep per pes pet pic pid pie pii pip pir pis pit ppc ppd ppe ppi ppp ppr pps ppt prc prd pre pri prp prr prs prt ps- psc psd pse psi psp psr pss pst pt- ptc ptd pte pti ptp ptr pts ptt rcc rcd rce rci rcp rcr rcs rct rdc rdd rde rdi rdp rdr rds rdt re- rec red ree rei rep rer res ret ric rid rie rii rip rir ris rit rpc rpd rpe rpi rpp rpr rps rpt rrc rrd rri rrp rrr rrs rrt rsc rsd rse rsi rsp rsr rss rst rtc rtd rte rti rtp rtr rts rtt scc scd sce sci scp scr scs sct sdc sdd sde sdi sdp sdr sds sdt se- sec sed see sei sep ser ses set sic sid sie sii sip sir sis sit spc spd spe spi spp spr sps spt sr- src srd sre sri srp srr srs srt ss- ssc ssd sse ssi ssp ssr sss sst stc std ste sti stp str sts stt tcc tcd tce tci tcp tcr tcs tct tdc tdd tde tdi tdp tdr tds tdt te- tec ted tee tei tep ter tes tet tic tid tie tii tip tir tis tit tpc tpd tpe tpi tpp tpr tps tpt trc trd tre tri trp trr trs trt tsc tsd tse tsi tsp tsr tss tst ttc ttd tte tti ttp ttr tts ttt