rubrum[10],
bums[8], slum[7], murr[6], rums[6], surr[4],
bum[7], ulm[6], brr[5], mur[5], rum[5], bus[5], mus[5], ums[5], lus[4], rus[3], sur[3], urs[3],
um[4], ul[3], ur[2],