-er -ic c-- ccc cce cci cco ccr ccv ce- cec cee cei ceo cer cev ci- cic cie cii cio cir civ co- coc coe coi coo cor cov crc cre cri cro crr crv cvc cve cvi cvo cvr cvv ec- ecc ece eci eco ecr ecv eec eee eeo eer eev eic eie eii eio eir eiv eo- eoc eoe eoi eoo eor erc ere eri ero err erv evc eve evi evo evr evv i-v icc ice ici ico icr icv ie- iec iee iei ier iev iic iie iii iio iir io- ioc ioe ioi ioo ior iov ir- irc ire iri iro irr irv ivc ive ivi ivo ivr ivv o-i oc- occ oci oco ocr ocv oec oee oei oeo oer oic oie oii oio oir oiv oo- ooc ooi ooo oor oov or- orc ore ori oro orr orv ov- ovc ove ovi ovo ovv rcc rce rci rco rcr rcv re- rec ree rei reo rer rev ric rie rii rio rir riv roc roe roi roo ror rov rrc rri rrr rvc rve rvi rvo rvr rvv v-e vcc vce vci vco vcr vec vee vei veo ver vi- vic vie vii vio vir viv voc voe voi voo vor vov vrc vre vri vrr vvc vvi vvo vvr vvv