-er -ic c-- ccc cce cci cck cco ccr ccv ce- cec cee cei cek ceo cer cev ci- cic cie cii cik cio cir civ ckc cki cko co- coc coe coi cok coo cor cov crc cre cri crk cro crr crv cvc cve cvi cvk cvo cvr cvv ec- ecc ece eci eck eco ecr ecv eec eee eek eeo eer eev eic eie eii eik eio eir eiv ekc eke eki eko ekr ekv eo- eoc eoe eoi eok eoo eor erc ere eri erk ero err erv evc eve evi evo evr evv i-v icc ice ici ick ico icr icv ie- iec iee iei iek ier iev iic iie iii iio iir ikc ike iki ikk iko ikr ikv io- ioc ioe ioi ioo ior iov ir- irc ire iri irk iro irr irv ivc ive ivi ivo ivr ivv kcc kce kci kck kcr ke- kec kee kei kek keo ker kev kic kie kii kik kio kir kiv kkc kke kki kkk kkr kkv koc koe koi kok koo kor krc kri krk kro krr krv kvi kvk kvo kvr kvv o-i oc- occ oci ock oco ocr ocv oec oee oei oeo oer oic oie oii oik oio oir oiv okc oke oki okk oko okr oo- ooc ooi ook ooo oor oov or- orc ore ori ork oro orr orv ov- ovc ove ovi ovo ovv rcc rce rci rco rcr rcv re- rec ree rei rek reo rer rev ric rie rii rik rio rir riv rkc rke rkk rko rkv roc roe roi rok roo ror rov rrc rri rrk rrr rvc rve rvi rvo rvr rvv v-e vcc vce vci vco vcr vec vee vei vek veo ver vi- vic vie vii vik vio vir viv voc voe voi vok voo vor vov vrc vre vri vrk vrr vvc vvi vvo vvr vvv