burli[8], birrs[7], silur[6],
birr[6], bris[6], sirr[4], surr[4],
brr[5], bis[5], bus[5], lus[4], irr[3], sir[3], rus[3], sur[3], urs[3],
bi[4], ul[3], si[2], ui[2], ur[2],
