-er c-- ccc ccd cce ccn ccr ccv cdc cdd cde cdn cdr cdv ce- cec ced cee cen cer cev cn- cnc cnd cne cnn cnr cnv crc crd cre crn crr crv cvc cvd cve cvn cvr cvv dcc dcd dce dcn dcr dcv ddc ddd dde ddn ddr de- dec ded dee den der dev dnc dnd dne dnn dnr drc drd dre drn drr drv dvc dvd dve dvn dvr ec- ecc ecd ece ecn ecr ecv ed- edc edd ede edn edr eec eed eee een eer eev en- enc end ene enn enr env erc erd ere ern err erv evc evd eve evn evr evv ncc ncd nce ncn ncr ncv ndc ndd nde ndn ndr ndv ne- nec ned nee nen ner nev nnc nne nnn nnv nrc nrd nre nrn nrr nrv nvc nvd nve nvn nvv rcc rcd rce rcn rcr rcv rdc rdd rde rdn rdr rdv re- rec red ree ren rer rev rnc rnd rnn rnr rnv rrc rrd rrn rrr rvc rvd rve rvn rvr rvv v-e vcc vcd vce vcn vcr vdc vdd vde vdr vdv vec ved vee ven ver vn- vnd vnr vnv vrc vrd vre vrn vrr vvc vvr vvv