-al -ol a-a aaa aaf aal aao aar aav af- afa aff afl afo afr afv al- ala alf all alo alr alv aoa aof aol aoo aor aov ar- ara arf arl aro arr arv av- ava avf avl avo avr faa faf fal fao far fav ffa fff ffl ffo ffr ffv fla flf fll flo flr foa fof fol foo for fra frf frl fro frr fva la- laa laf lal lao lar lav lfa lff lfl lfo lfr lla llf lll llo llr llv loa lof lol loo lor lov lra lrf lro lrr lrv lva lvf lvl lvr lvv oaa oaf oal oao oar oav of- ofa off ofl ofo ofr ofv ola olf oll olo oo- ooa oof ool ooo oor oov or- ora orf orl oro orr orv ov- ova ovf ovl ovo ovv ra- raa raf ral rao rar rav rfa rff rfl rfo rfr rfv rla rlf rll rlo rlr roa rof rol roo ror rov rra rrf rrl rrr rva rvf rvl rvo rvr rvv v-a vaa val vao var vav vfa vff vfl vfr vfv vl- vla vlf vll vlo vlv voa vof vol voo vor vov vra vrf vrr vva vvo vvr vvv