-er -ic c-- ccc ccd cce cci cck cco ccr cct ccv cdc cdd cde cdi cdk cdo cdr cdt cdv ce- cec ced cee cei cek ceo cer cet cev ci- cic cid cie cii cik cio cir cit civ ckc ckd cki cko ckt co- coc cod coe coi cok coo cor cot cov crc crd cre cri crk cro crr crt crv ctc ctd cte cti ctk cto ctr ctt ctv cvc cvd cve cvi cvk cvo cvr cvt cvv dcc dcd dce dci dck dco dcr dct dcv ddc ddd dde ddi ddk ddo ddr ddt de- dec ded dee dei dek deo der det dev di- dic did die dii dik dio dir dit div dkc dke dki dkk dko dkr dkt doc dod doe doi dok doo dor dot dov drc drd dre dri drk dro drr drt drv dtc dtd dte dti dtk dto dtr dtt dtv dvc dvd dve dvi dvk dvr dvt ec- ecc ecd ece eci eck eco ecr ect ecv ed- edc edd ede edi edk edo edr edt eec eed eee eek eeo eer eet eev eic eid eie eii eik eio eir eit eiv ekc ekd eke eki eko ekr ekt ekv eo- eoc eod eoe eoi eok eoo eor eot erc erd ere eri erk ero err ert erv etc etd ete eti etk eto etr ett etv evc evd eve evi evo evr evt evv i-d i-v icc icd ice ici ick ico icr ict icv idc idd ide idi idk ido idr idt idv ie- iec ied iee iei iek ier iet iev iic iid iie iii iio iir iit ikc ike iki ikk iko ikr ikt ikv io- ioc iod ioe ioi ioo ior iot iov ir- irc ird ire iri irk iro irr irt irv itc itd ite iti itk ito itt itv ivc ivd ive ivi ivo ivr ivt ivv k-t kcc kcd kce kci kck kcr kct kdc kde kdk kdo kdr kdt ke- kec ked kee kei kek keo ker ket kev kic kid kie kii kik kio kir kit kiv kkc kke kki kkk kkr kkt kkv koc kod koe koi kok koo kor kot krc krd kri krk kro krr krt krv ktc kte ktk kto ktr ktt ktv kvi kvk kvo kvr kvv o-i oc- occ ocd oci ock oco ocr oct ocv odc odd ode odi odo odr odt odv oec oed oee oei oeo oer oet oic oid oie oii oik oio oir oit oiv okc okd oke oki okk oko okr oo- ooc ood ooi ook ooo oor oot oov or- orc ord ore ori ork oro orr ort orv ot- otc otd ote oti otk oto otr ott otv ov- ovc ovd ove ovi ovo ovv rcc rcd rce rci rco rcr rct rcv rdc rdd rde rdi rdo rdr rdt rdv re- rec red ree rei rek reo rer ret rev ric rid rie rii rik rio rir rit riv rkc rke rkk rko rkt rkv roc rod roe roi rok roo ror rot rov rrc rrd rri rrk rrr rrt rtc rtd rte rti rtk rto rtr rtt rtv rvc rvd rve rvi rvo rvr rvt rvv tcc tcd tce tci tck tco tcr tct tcv tdc tdd tde tdi tdk tdo tdr tdt tdv te- tec ted tee tei tek teo ter tet tev tic tid tie tii tik tio tir tit tiv tkc tke tkk tko tkr tkt to- toc tod toe toi tok too tor tot tov trc trd tre tri trk tro trr trt trv ttc ttd tte tti ttk tto ttr ttt ttv tvc tvd tve tvi tvk tvo tvr tvt v-e vcc vcd vce vci vco vcr vct vdc vdd vde vdi vdk vdo vdr vdt vdv vec ved vee vei vek veo ver vet vi- vic vid vie vii vik vio vir vit viv vkt voc vod voe voi vok voo vor vot vov vrc vrd vre vri vrk vrr vrt vtc vte vti vtk vto vtr vtt vtv vvc vvi vvo vvr vvt vvv