kudu[10], udku[10], duru[9], urdu[9], kuru[9], druk[8], runu[8], rund[7], knur[7],
udu[8], dnu[6], nud[6], kun[6], dur[6], rud[6], urd[6], kur[6], nur[5], run[5], urn[5],
uu[6], ud[5], ku[5], nu[4],
