a-a a-i aaa aaf aai aan aar aav af- afa aff afi afn afr afv ai- aia aif aii ain air aiv an- ana anf ani ann anr anv ar- ara arf ari arn arr arv av- ava avf avi avn avr faa faf fai fan far fav ffa fff ffi ffn ffr ffv fia fif fii fin fir fna fnf fni fnn fnr fnv fra frf fri frn frr fva i-f i-v ia- iaa iaf iai ian iar iav ifa iff ifi ifn ifr iia iif iii iin iir in- ina inf ini inn inr inv ir- ira irf iri irn irr irv iva ivf ivi ivr ivv n-i naa naf nai nan nar nav nfa nff nfi nfn nfr nfv nia nif nii nin nir niv nna nnf nni nnn nnv nra nrf nri nrn nrr nrv nva nvi nvn nvv ra- raa raf rai ran rar rav rfa rff rfi rfn rfr rfv ria rif rii rin rir riv rna rni rnn rnr rnv rra rrf rri rrn rrr rva rvf rvi rvn rvr rvv v-a vaa vai van var vav vfa vff vfi vfn vfr vfv vi- via vif vii vin vir viv vn- vna vnf vni vnr vnv vra vrf vri vrn vrr vva vvi vvr vvv