bul[8], lub[8], bum[8], umb[8], lum[7], mul[7], bun[7], bru[7], bur[7], lnu[6], lun[6], nul[6], mun[6], lur[6], mru[6], mur[6], rum[6], nur[5], run[5], urn[5],
bu[6], lu[5], ul[5], mu[5], nu[4],
