brot[7], birr[6], roit[5], tiro[5], trio[5], torr[5], irrt[4],
bio[6], obi[6], bor[6], bot[6], tob[6], brr[5], bit[5], roi[4], ort[4], rot[4], tor[4], irr[3],
ob[5], bi[4], ti[2],
