nubuk[12], bruku[12], burku[12], nurku[10], runku[10],
buku[11], kubu[11], ubku[11], bruk[9], kuru[9], runu[8], knur[7],
buu[9], buk[8], kub[8], bun[7], bru[7], bur[7], kun[6], kur[6], nur[5], run[5], urn[5],
bu[6], uu[6], ku[5], nu[4],
