fff ffg ffo ffr ffw fgf fgg fgr fgw fof fog foo for fow frf frg fro frr frw fwf fwo gff gfo gfr gfw ggg ggo ggr ggw gof gog goo gor gow grf grg gro grr grw gwf gwg gwr of- off ofg ofo ofr ofw ogf ogg ogo oo- oof oog ooo oor oow or- orf org oro orr owf owo oww rff rfg rfo rfr rfw rgf rgg rgo rgr rgw rof rog roo ror row rrf rrg rrr rwf rwr wff wfg wfo wfr wfw wgo wgr wgw wof wog woo wor wow wr- wrf wrg wro wrr wrw wwf wwo www