ficus[11], friss[8], sufis[8],
sufi[7], rufs[7], surf[7], fuss[7], riss[4], sirs[4], russ[4],
cis[6], sic[6], fis[6], ruf[6], sir[3], iss[3], rus[3], sur[3], urs[3],
si[2], ui[2], ur[2],
