-er -ic c-- ccc ccd cce cci cck cco ccr ccv cdc cdd cde cdi cdk cdo cdr cdv ce- cec ced cee cei cek ceo cer cev ci- cic cid cie cii cik cio cir civ ckc ckd cki cko co- coc cod coe coi cok coo cor cov crc crd cre cri crk cro crr crv cvc cvd cve cvi cvk cvo cvr cvv dcc dcd dce dci dck dco dcr dcv ddc ddd dde ddi ddk ddo ddr de- dec ded dee dei dek deo der dev di- dic did die dii dik dio dir div dkc dke dki dkk dko dkr doc dod doe doi dok doo dor dov drc drd dre dri drk dro drr drv dvc dvd dve dvi dvk dvr ec- ecc ecd ece eci eck eco ecr ecv ed- edc edd ede edi edk edo edr eec eed eee eek eeo eer eev eic eid eie eii eik eio eir eiv ekc ekd eke eki eko ekr ekv eo- eoc eod eoe eoi eok eoo eor erc erd ere eri erk ero err erv evc evd eve evi evo evr evv i-d i-v icc icd ice ici ick ico icr icv idc idd ide idi idk ido idr idv ie- iec ied iee iei iek ier iev iic iid iie iii iio iir ikc ike iki ikk iko ikr ikv io- ioc iod ioe ioi ioo ior iov ir- irc ird ire iri irk iro irr irv ivc ivd ive ivi ivo ivr ivv kcc kcd kce kci kck kcr kdc kde kdk kdo kdr ke- kec ked kee kei kek keo ker kev kic kid kie kii kik kio kir kiv kkc kke kki kkk kkr kkv koc kod koe koi kok koo kor krc krd kri krk kro krr krv kvi kvk kvo kvr kvv o-i oc- occ ocd oci ock oco ocr ocv odc odd ode odi odo odr odv oec oed oee oei oeo oer oic oid oie oii oik oio oir oiv okc okd oke oki okk oko okr oo- ooc ood ooi ook ooo oor oov or- orc ord ore ori ork oro orr orv ov- ovc ovd ove ovi ovo ovv rcc rcd rce rci rco rcr rcv rdc rdd rde rdi rdo rdr rdv re- rec red ree rei rek reo rer rev ric rid rie rii rik rio rir riv rkc rke rkk rko rkv roc rod roe roi rok roo ror rov rrc rrd rri rrk rrr rvc rvd rve rvi rvo rvr rvv v-e vcc vcd vce vci vco vcr vdc vdd vde vdi vdk vdo vdr vdv vec ved vee vei vek veo ver vi- vic vid vie vii vik vio vir viv voc vod voe voi vok voo vor vov vrc vrd vre vri vrk vrr vvc vvi vvo vvr vvv