hub[9], but[8], tub[8], hut[8], bun[7], hun[7], bru[7], bur[7], buz[7], bzu[7], nut[6], rut[6], tur[6], tuz[6], nur[5], run[5], urn[5],
bu[6], hu[6], tu[5], ut[5], nu[4],