spür[12], cups[10], rips[7], purr[7], supi[7], spur[7], sirr[4], surr[4],
cup[9], cis[6], sic[6], pis[6], psi[6], pur[6], ups[6], irr[3], sir[3], rus[3], sur[3], urs[3],
pi[5], si[2], ui[2], ur[2],
