a-a a-c aaa aac aad aaf aan aao aar aav ac- aca acc acd acf acn aco acr acv ad- ada adc add adf adn ado adr adv af- afa afc afd aff afn afo afr afv an- ana anc and anf ann ano anr anv aoa aoc aod aof aon aoo aor aov ar- ara arc ard arf arn aro arr arv av- ava avc avd avf avn avo avr c-- caa cac cad caf can cao car cav cca ccc ccd ccf ccn cco ccr ccv cda cdc cdd cdf cdn cdo cdr cdv cfa cfc cfd cff cfn cfo cfr cfv cn- cna cnc cnd cnf cnn cno cnr cnv co- coa coc cod cof con coo cor cov cra crc crd crf crn cro crr crv cva cvc cvd cvf cvn cvo cvr cvv daa dac dad daf dan dao dar dav dca dcc dcd dcf dcn dco dcr dcv dda ddc ddd ddf ddn ddo ddr dfa dfc dfd dff dfn dfo dfr dfv dna dnc dnd dnf dnn dno dnr doa doc dod dof don doo dor dov dra drc drd drn dro drr drv dva dvc dvd dvn dvr faa fac fad faf fan fao far fav fca fcc fcd fcf fcn fco fcr fcv fda fdc fdd fdf fdn fdo fdr ffa ffc ffd fff ffn ffo ffr ffv fna fnc fnd fnf fnn fnr fnv foa foc fof fon foo for fra frc frd frf frn fro frr fva fvc fvd naa nac nad naf nan nao nar nav nca ncc ncd ncf ncn nco ncr ncv nda ndc ndd ndf ndn ndo ndr ndv nfa nfc nfd nff nfn nfo nfr nfv nna nnc nnf nnn nno nnv no- noa noc nod nof non noo nor nov nra nrc nrd nrf nrn nro nrr nrv nva nvc nvd nvn nvv oaa oac oad oaf oan oao oar oav oc- oca occ ocd ocf ocn oco ocr ocv oda odc odd odf odn odo odr odv of- ofa ofc ofd off ofn ofo ofr ofv on- ona onc ond onf onn ono onr oo- ooa ooc ood oof oon ooo oor oov or- ora orc ord orf orn oro orr orv ov- ova ovc ovd ovf ovo ovv ra- raa rac rad raf ran rao rar rav rca rcc rcd rcf rcn rco rcr rcv rda rdc rdd rdf rdn rdo rdr rdv rfa rfc rfd rff rfn rfo rfr rfv rna rnc rnd rnn rno rnr rnv roa roc rod rof ron roo ror rov rra rrc rrd rrf rrn rrr rva rvc rvd rvf rvn rvo rvr rvv v-a vaa vac vad van vao var vav vca vcc vcd vcf vcn vco vcr vdc vdd vdf vdo vdr vdv vfa vfc vfd vff vfn vfr vfv vn- vna vnd vnf vno vnr vnv voa voc vod vof von voo vor vov vra vrc vrd vrf vrn vrr vva vvc vvo vvr vvv