buc[8], bud[8], cud[7], bun[7], bru[7], bur[7], dnu[6], nud[6], cru[6], dur[6], rud[6], urd[6], dwu[6], nur[5], run[5], urn[5], wun[5],
bu[6], ud[5], nu[4], wu[4],