buś[11], bug[9], gub[9], buc[8], cug[8], pub[8], bun[7], gnu[7], cup[7], puc[7], bru[7], bur[7], gur[7], rug[7], pun[6], cru[6], nur[5], run[5], urn[5],
bu[6], gu[6], nu[4],