-er -ic c-- ccc cce cci cck ccr ccv ce- cec cee cei cek cer cev ci- cic cie cii cik cir civ ckc cki crc cre cri crk crr crv cvc cve cvi cvk cvr cvv ec- ecc ece eci eck ecr ecv eec eee eek eer eev eic eie eii eik eir eiv ekc eke eki ekr ekv erc ere eri erk err erv evc eve evi evr evv i-v icc ice ici ick icr icv ie- iec iee iei iek ier iev iic iie iii iir ikc ike iki ikk ikr ikv ir- irc ire iri irk irr irv ivc ive ivi ivr ivv kcc kce kci kck kcr ke- kec kee kei kek ker kev kic kie kii kik kir kiv kkc kke kki kkk kkr kkv krc kri krk krr krv kvi kvk kvr kvv rcc rce rci rcr rcv re- rec ree rei rek rer rev ric rie rii rik rir riv rkc rke rkk rkv rrc rri rrk rrr rvc rve rvi rvr rvv v-e vcc vce vci vcr vec vee vei vek ver vi- vic vie vii vik vir viv vrc vre vri vrk vrr vvc vvi vvr vvv