a-a a-t aaa aaf aao aar aat aav af- afa aff afo afr aft afv aoa aof aoo aor aot aov ar- ara arf aro arr art arv at- ata atf ato atr att atv av- ava avf avo avr avt faa faf fao far fat fav ffa fff ffo ffr fft ffv foa fof foo for fot fra frf fro frr frt fta ftf fto ftr ftt ftv fva fvt oaa oaf oao oar oat oav of- ofa off ofo ofr oft ofv oo- ooa oof ooo oor oot oov or- ora orf oro orr ort orv ot- ota otf oto otr ott otv ov- ova ovf ovo ovv ra- raa raf rao rar rat rav rfa rff rfo rfr rft rfv roa rof roo ror rot rov rra rrf rrr rrt rta rtf rto rtr rtt rtv rva rvf rvo rvr rvt rvv taa taf tao tar tat tav tfa tff tfo tfr tft to- toa tof too tor tot tov tra trf tro trr trt trv tta ttf tto ttr ttt ttv tva tvf tvo tvr tvt v-a vaa vao var vat vav vfa vff vfr vft vfv voa vof voo vor vot vov vra vrf vrr vrt vta vto vtr vtt vtv vva vvo vvr vvt vvv