-er -ic c-- ccc cce cci cck cco ccr cct ccv ce- cec cee cei cek ceo cer cet cev ci- cic cie cii cik cio cir cit civ ckc cki cko ckt co- coc coe coi cok coo cor cot cov crc cre cri crk cro crr crt crv ctc cte cti ctk cto ctr ctt ctv cvc cve cvi cvk cvo cvr cvt cvv ec- ecc ece eci eck eco ecr ect ecv eec eee eek eeo eer eet eev eic eie eii eik eio eir eit eiv ekc eke eki eko ekr ekt ekv eo- eoc eoe eoi eok eoo eor eot erc ere eri erk ero err ert erv etc ete eti etk eto etr ett etv evc eve evi evo evr evt evv i-v icc ice ici ick ico icr ict icv ie- iec iee iei iek ier iet iev iic iie iii iio iir iit ikc ike iki ikk iko ikr ikt ikv io- ioc ioe ioi ioo ior iot iov ir- irc ire iri irk iro irr irt irv itc ite iti itk ito itt itv ivc ive ivi ivo ivr ivt ivv k-t kcc kce kci kck kcr kct ke- kec kee kei kek keo ker ket kev kic kie kii kik kio kir kit kiv kkc kke kki kkk kkr kkt kkv koc koe koi kok koo kor kot krc kri krk kro krr krt krv ktc kte ktk kto ktr ktt ktv kvi kvk kvo kvr kvv o-i oc- occ oci ock oco ocr oct ocv oec oee oei oeo oer oet oic oie oii oik oio oir oit oiv okc oke oki okk oko okr oo- ooc ooi ook ooo oor oot oov or- orc ore ori ork oro orr ort orv ot- otc ote oti otk oto otr ott otv ov- ovc ove ovi ovo ovv rcc rce rci rco rcr rct rcv re- rec ree rei rek reo rer ret rev ric rie rii rik rio rir rit riv rkc rke rkk rko rkt rkv roc roe roi rok roo ror rot rov rrc rri rrk rrr rrt rtc rte rti rtk rto rtr rtt rtv rvc rve rvi rvo rvr rvt rvv tcc tce tci tck tco tcr tct tcv te- tec tee tei tek teo ter tet tev tic tie tii tik tio tir tit tiv tkc tke tkk tko tkr tkt to- toc toe toi tok too tor tot tov trc tre tri trk tro trr trt trv ttc tte tti ttk tto ttr ttt ttv tvc tve tvi tvk tvo tvr tvt v-e vcc vce vci vco vcr vct vec vee vei vek veo ver vet vi- vic vie vii vik vio vir vit viv vkt voc voe voi vok voo vor vot vov vrc vre vri vrk vrr vrt vtc vte vti vtk vto vtr vtt vtv vvc vvi vvo vvr vvt vvv