-er a-a a-c aaa aac aad aae aan aar aav ac- aca acc acd ace acn acr acv ad- ada adc add ade adn adr adv aea aec aed aee aen aer aev an- ana anc and ane ann anr anv ar- ara arc ard are arn arr arv av- ava avc avd ave avn avr c-- caa cac cad cae can car cav cca ccc ccd cce ccn ccr ccv cda cdc cdd cde cdn cdr cdv ce- cea cec ced cee cen cer cev cn- cna cnc cnd cne cnn cnr cnv cra crc crd cre crn crr crv cva cvc cvd cve cvn cvr cvv daa dac dad dae dan dar dav dca dcc dcd dce dcn dcr dcv dda ddc ddd dde ddn ddr de- dea dec ded dee den der dev dna dnc dnd dne dnn dnr dra drc drd dre drn drr drv dva dvc dvd dve dvn dvr eaa eac ead eae ean ear eav ec- eca ecc ecd ece ecn ecr ecv ed- eda edc edd ede edn edr eea eec eed eee een eer eev en- ena enc end ene enn enr env era erc erd ere ern err erv eva evc evd eve evn evr evv naa nac nad nae nan nar nav nca ncc ncd nce ncn ncr ncv nda ndc ndd nde ndn ndr ndv ne- nea nec ned nee nen ner nev nna nnc nne nnn nnv nra nrc nrd nre nrn nrr nrv nva nvc nvd nve nvn nvv ra- raa rac rad rae ran rar rav rca rcc rcd rce rcn rcr rcv rda rdc rdd rde rdn rdr rdv re- rea rec red ree ren rer rev rna rnc rnd rnn rnr rnv rra rrc rrd rrn rrr rva rvc rvd rve rvn rvr rvv v-a v-e vaa vac vad vae van var vav vca vcc vcd vce vcn vcr vdc vdd vde vdr vdv vea vec ved vee ven ver vn- vna vnd vnr vnv vra vrc vrd vre vrn vrr vva vvc vvr vvv