-er -ic c-- ccc cce cci ccp ccr cct ccv ce- cec cee cei cep cer cet cev ci- cic cie cii cip cir cit civ cpc cpe cpi cpp cpr cpt cpv crc cre cri crp crr crt crv ctc cte cti ctp ctr ctt ctv cvc cve cvi cvp cvr cvt cvv ec- ecc ece eci ecr ect ecv eec eee eep eer eet eev eic eie eii eip eir eit eiv ep- epc epe epi epp epr ept erc ere eri erp err ert erv etc ete eti etp etr ett etv evc eve evi evp evr evt evv i-v icc ice ici icp icr ict icv ie- iec iee iei iep ier iet iev iic iie iii iip iir iit ipc ipe ipi ipp ipr ipt ipv ir- irc ire iri irp irr irt irv itc ite iti itp itt itv ivc ive ivi ivp ivr ivt ivv p-p pcc pce pci pcp pcr pct pcv pec pee pei pep per pet pev pic pie pii pip pir pit piv ppc ppe ppi ppp ppr ppt ppv prc pre pri prp prr prt prv pt- ptc pte pti ptp ptr ptt ptv pvc pve pvi pvp pvr pvt pvv rcc rce rci rcp rcr rct rcv re- rec ree rei rep rer ret rev ric rie rii rip rir rit riv rpc rpe rpi rpp rpr rpt rpv rrc rri rrp rrr rrt rtc rte rti rtp rtr rtt rtv rvc rve rvi rvp rvr rvt rvv tcc tce tci tcp tcr tct tcv te- tec tee tei tep ter tet tev tic tie tii tip tir tit tiv tpc tpe tpi tpp tpr tpt tpv trc tre tri trp trr trt trv ttc tte tti ttp ttr ttt ttv tvc tve tvi tvp tvr tvt v-e vcc vce vci vcp vcr vct vec vee vei vep ver vet vi- vic vie vii vip vir vit viv vpc vpe vpi vpp vpr vpt vrc vre vri vrp vrr vrt vtc vte vti vtr vtt vtv vvc vvi vvr vvt vvv