-er -ic c-- ccc cce cci ccr cct ccv ccx ce- cec cee cei cer cet cev cex ci- cic cie cii cir cit civ cix crc cre cri crr crt crv crx ctc cte cti ctr ctt ctv ctx cvc cve cvi cvr cvt cvv cvx cxc cxi cxr cxt cxv cxx ec- ecc ece eci ecr ect ecv ecx eec eee eer eet eev eex eic eie eii eir eit eiv eix erc ere eri err ert erv etc ete eti etr ett etv etx evc eve evi evr evt evv ex- exc exe exi exr ext exx i-v icc ice ici icr ict icv ie- iec iee iei ier iet iev iex iic iie iii iir iit iix ir- irc ire iri irr irt irv irx itc ite iti itt itv itx ivc ive ivi ivr ivt ivv ivx ixc ixe ixi rcc rce rci rcr rct rcv rcx re- rec ree rei rer ret rev rex ric rie rii rir rit riv rix rrc rri rrr rrt rtc rte rti rtr rtt rtv rtx rvc rve rvi rvr rvt rvv rxr t-x tcc tce tci tcr tct tcv tcx te- tec tee tei ter tet tev tex tic tie tii tir tit tiv tix trc tre tri trr trt trv trx ttc tte tti ttr ttt ttv ttx tvc tve tvi tvr tvt tvx txe txi txt v-e vcc vce vci vcr vct vcx vec vee vei ver vet vex vi- vic vie vii vir vit viv vix vrc vre vri vrr vrt vtc vte vti vtr vtt vtv vtx vvc vvi vvr vvt vvv vxr vxv xci xcr xcv xcx xee xer xet xev xex xic xie xii xit xiv xix xrc xrt xrx xtc xti xtr xtv xtx xvi xvt xxi xxv xxx