6 letter words:
griffs13,
5 letter words:
griff12,
riffs11,
frigs9,
4 letter words:
riff10,
figs8,
frig8,
firs7,
fris7,
rifs7,
gris5,
rigs5,
3 letter words:
iff9,
fig7,
gif7,
fir6,
ifs6,
rif6,
sif6,
gis4,
rig4,
sir3,
sri3,
2 letter words:
if5,
gi3,
is2,
si2,