skiff[14], riffs[11], siffs[11], friss[8], kriss[8],
kiff[13], riff[10], siff[10], kirs[7], kris[7], skis[7], bris[6], biss[6], riss[4], sirs[4],
kir[6], fis[6], ski[6], bis[5], sir[3], iss[3],
bi[4], si[2],
