-er -ic c-- ccc cce cci cco ccr cct ccv ce- cec cee cei ceo cer cet cev ci- cic cie cii cio cir cit civ co- coc coe coi coo cor cot cov crc cre cri cro crr crt crv ctc cte cti cto ctr ctt ctv cvc cve cvi cvo cvr cvt cvv ec- ecc ece eci eco ecr ect ecv eec eee eeo eer eet eev eic eie eii eio eir eit eiv eo- eoc eoe eoi eoo eor eot erc ere eri ero err ert erv etc ete eti eto etr ett etv evc eve evi evo evr evt evv i-v icc ice ici ico icr ict icv ie- iec iee iei ier iet iev iic iie iii iio iir iit io- ioc ioe ioi ioo ior iot iov ir- irc ire iri iro irr irt irv itc ite iti ito itt itv ivc ive ivi ivo ivr ivt ivv o-i oc- occ oci oco ocr oct ocv oec oee oei oeo oer oet oic oie oii oio oir oit oiv oo- ooc ooi ooo oor oot oov or- orc ore ori oro orr ort orv ot- otc ote oti oto otr ott otv ov- ovc ove ovi ovo ovv rcc rce rci rco rcr rct rcv re- rec ree rei reo rer ret rev ric rie rii rio rir rit riv roc roe roi roo ror rot rov rrc rri rrr rrt rtc rte rti rto rtr rtt rtv rvc rve rvi rvo rvr rvt rvv tcc tce tci tco tcr tct tcv te- tec tee tei teo ter tet tev tic tie tii tio tir tit tiv to- toc toe toi too tor tot tov trc tre tri tro trr trt trv ttc tte tti tto ttr ttt ttv tvc tve tvi tvo tvr tvt v-e vcc vce vci vco vcr vct vec vee vei veo ver vet vi- vic vie vii vio vir vit viv voc voe voi voo vor vot vov vrc vre vri vrr vrt vtc vte vti vto vtr vtt vtv vvc vvi vvo vvr vvt vvv