-er a-a a-c aaa aac aad aae aaf aan aar aav ac- aca acc acd ace acf acn acr acv ad- ada adc add ade adf adn adr adv aea aec aed aee aef aen aer aev af- afa afc afd afe aff afn afr afv an- ana anc and ane anf ann anr anv ar- ara arc ard are arf arn arr arv av- ava avc avd ave avf avn avr c-- caa cac cad cae caf can car cav cca ccc ccd cce ccf ccn ccr ccv cda cdc cdd cde cdf cdn cdr cdv ce- cea cec ced cee cef cen cer cev cfa cfc cfd cfe cff cfn cfr cfv cn- cna cnc cnd cne cnf cnn cnr cnv cra crc crd cre crf crn crr crv cva cvc cvd cve cvf cvn cvr cvv daa dac dad dae daf dan dar dav dca dcc dcd dce dcf dcn dcr dcv dda ddc ddd dde ddf ddn ddr de- dea dec ded dee def den der dev dfa dfc dfd dfe dff dfn dfr dfv dna dnc dnd dne dnf dnn dnr dra drc drd dre drn drr drv dva dvc dvd dve dvn dvr eaa eac ead eae eaf ean ear eav ec- eca ecc ecd ece ecf ecn ecr ecv ed- eda edc edd ede edf edn edr eea eec eed eee eef een eer eev ef- efa efc efd efe eff efr en- ena enc end ene enf enn enr env era erc erd ere erf ern err erv eva evc evd eve evf evn evr evv faa fac fad fae faf fan far fav fca fcc fcd fce fcf fcn fcr fcv fda fdc fdd fde fdf fdn fdr fea fec fed fee fef fen fer fev ffa ffc ffd ffe fff ffn ffr ffv fna fnc fnd fne fnf fnn fnr fnv fra frc frd fre frf frn frr fva fvc fvd naa nac nad nae naf nan nar nav nca ncc ncd nce ncf ncn ncr ncv nda ndc ndd nde ndf ndn ndr ndv ne- nea nec ned nee nef nen ner nev nfa nfc nfd nfe nff nfn nfr nfv nna nnc nne nnf nnn nnv nra nrc nrd nre nrf nrn nrr nrv nva nvc nvd nve nvn nvv ra- raa rac rad rae raf ran rar rav rca rcc rcd rce rcf rcn rcr rcv rda rdc rdd rde rdf rdn rdr rdv re- rea rec red ree ref ren rer rev rfa rfc rfd rfe rff rfn rfr rfv rna rnc rnd rnn rnr rnv rra rrc rrd rrf rrn rrr rva rvc rvd rve rvf rvn rvr rvv v-a v-e vaa vac vad vae van var vav vca vcc vcd vce vcf vcn vcr vdc vdd vde vdf vdr vdv vea vec ved vee vef ven ver vfa vfc vfd vff vfn vfr vfv vn- vna vnd vnf vnr vnv vra vrc vrd vre vrf vrn vrr vva vvc vvr vvv