a-a aaa aaf aag aan aao aar aav af- afa aff afg afn afo afr afv ag- aga agf agg agn ago agr agv an- ana anf ang ann ano anr anv aoa aof aog aon aoo aor aov ar- ara arf arg arn aro arr arv av- ava avf avg avn avo avr faa faf fag fan fao far fav ffa fff ffg ffn ffo ffr ffv fga fgf fgg fgn fgr fgv fna fnf fng fnn fnr fnv foa fof fog fon foo for fra frf frg frn fro frr fva fvg gaa gaf gag gan gao gar gav gfa gff gfo gfr gga ggg ggn ggo ggr ggv gna gnf gnn gno gnr gnv goa gof gog gon goo gor gov gra grf grg grn gro grr grv gva gvf gvg gvn gvo gvr naa naf nag nan nao nar nav nfa nff nfn nfo nfr nfv nga ngf ngg ngn ngo nna nnf nng nnn nno nnv no- noa nof nog non noo nor nov nra nrf nrg nrn nro nrr nrv nva nvg nvn nvv oaa oaf oag oan oao oar oav of- ofa off ofg ofn ofo ofr ofv oga ogf ogg ogn ogo on- ona onf ong onn ono onr oo- ooa oof oog oon ooo oor oov or- ora orf org orn oro orr orv ov- ova ovf ovo ovv ra- raa raf rag ran rao rar rav rfa rff rfg rfn rfo rfr rfv rga rgf rgg rgn rgo rgr rgv rna rng rnn rno rnr rnv roa rof rog ron roo ror rov rra rrf rrg rrn rrr rva rvf rvg rvn rvo rvr rvv v-a vaa vag van vao var vav vfa vff vfg vfn vfr vfv vga vgf vgg vgn vgo vgr vn- vna vnf vng vno vnr vnv voa vof vog von voo vor vov vra vrf vrg vrn vrr vva vvg vvo vvr vvv