rubrum[10],
bums[8], murr[6], rums[6], muss[6], sums[6], surr[4], russ[4], usus[4],
bum[7], brr[5], mur[5], rum[5], bus[5], mus[5], ums[5], rus[3], sur[3], urs[3],
um[4], ur[2],
