-er a-a a-c aaa aac aad aae aag aan aar aav ac- aca acc acd ace acg acn acr acv ad- ada adc add ade adg adn adr adv aea aec aed aee aeg aen aer aev ag- aga agc agd age agg agn agr agv an- ana anc and ane ang ann anr anv ar- ara arc ard are arg arn arr arv av- ava avc avd ave avg avn avr c-- caa cac cad cae cag can car cav cca ccc ccd cce ccg ccn ccr ccv cda cdc cdd cde cdg cdn cdr cdv ce- cea cec ced cee ceg cen cer cev cga cgc cgd cge cgg cgn cgr cgv cn- cna cnc cnd cne cng cnn cnr cnv cra crc crd cre crg crn crr crv cva cvc cvd cve cvg cvn cvr cvv daa dac dad dae dag dan dar dav dca dcc dcd dce dcg dcn dcr dcv dda ddc ddd dde ddg ddn ddr de- dea dec ded dee deg den der dev dga dgc dgd dge dgg dgn dgr dna dnc dnd dne dng dnn dnr dra drc drd dre drg drn drr drv dva dvc dvd dve dvg dvn dvr eaa eac ead eae eag ean ear eav ec- eca ecc ecd ece ecg ecn ecr ecv ed- eda edc edd ede edg edn edr eea eec eed eee eeg een eer eev ega egc egd ege egg egn egr en- ena enc end ene eng enn enr env era erc erd ere erg ern err erv eva evc evd eve evg evn evr evv g-d gaa gac gad gae gag gan gar gav gca gcc gcd gce gcg gcn gcr gda gdc gdd gde gdn gdr gdv ge- gea gec ged gee geg gen ger gev gga ggc ggd ggg ggn ggr ggv gna gnc gnd gne gnn gnr gnv gra grc grd gre grg grn grr grv gva gvc gvd gve gvg gvn gvr naa nac nad nae nag nan nar nav nca ncc ncd nce ncg ncn ncr ncv nda ndc ndd nde ndg ndn ndr ndv ne- nea nec ned nee neg nen ner nev nga ngc ngd nge ngg ngn nna nnc nne nng nnn nnv nra nrc nrd nre nrg nrn nrr nrv nva nvc nvd nve nvg nvn nvv ra- raa rac rad rae rag ran rar rav rca rcc rcd rce rcg rcn rcr rcv rda rdc rdd rde rdg rdn rdr rdv re- rea rec red ree reg ren rer rev rga rgc rgd rge rgg rgn rgr rgv rna rnc rnd rng rnn rnr rnv rra rrc rrd rrg rrn rrr rva rvc rvd rve rvg rvn rvr rvv v-a v-e vaa vac vad vae vag van var vav vca vcc vcd vce vcn vcr vdc vdd vde vdg vdr vdv vea vec ved vee veg ven ver vga vgc vgg vgn vgr vn- vna vnd vng vnr vnv vra vrc vrd vre vrg vrn vrr vva vvc vvg vvr vvv