-er -ic c-- ccc cce cci cco ccp ccr ccv ce- cec cee cei ceo cep cer cev ci- cic cie cii cio cip cir civ co- coc coe coi coo cop cor cov cpc cpe cpi cpo cpp cpr cpv crc cre cri cro crp crr crv cvc cve cvi cvo cvp cvr cvv ec- ecc ece eci eco ecr ecv eec eee eeo eep eer eev eic eie eii eio eip eir eiv eo- eoc eoe eoi eoo eop eor ep- epc epe epi epo epp epr erc ere eri ero erp err erv evc eve evi evo evp evr evv i-v icc ice ici ico icp icr icv ie- iec iee iei iep ier iev iic iie iii iio iip iir io- ioc ioe ioi ioo iop ior iov ipc ipe ipi ipo ipp ipr ipv ir- irc ire iri iro irp irr irv ivc ive ivi ivo ivp ivr ivv o-i oc- occ oci oco ocp ocr ocv oec oee oei oeo oep oer oic oie oii oio oip oir oiv oo- ooc ooi ooo oop oor oov op- opc ope opi opo opp opr opv or- orc ore ori oro orp orr orv ov- ovc ove ovi ovo ovp ovv p-p pcc pce pci pco pcp pcr pcv pec pee pei peo pep per pev pic pie pii pio pip pir piv poc poe poi poo pop por pov ppc ppe ppi ppo ppp ppr ppv prc pre pri pro prp prr prv pvc pve pvi pvo pvp pvr pvv rcc rce rci rco rcp rcr rcv re- rec ree rei reo rep rer rev ric rie rii rio rip rir riv roc roe roi roo rop ror rov rpc rpe rpi rpo rpp rpr rpv rrc rri rrp rrr rvc rve rvi rvo rvp rvr rvv v-e vcc vce vci vco vcp vcr vec vee vei veo vep ver vi- vic vie vii vio vip vir viv voc voe voi voo vop vor vov vpc vpe vpi vpo vpp vpr vrc vre vri vrp vrr vvc vvi vvo vvr vvv