burg[7], grub[7], bunt[6], brut[6], trub[6], butt[6], gurr[5], gurt[5], trug[5], turn[4], tunt[4],
bug[6], brr[5], gnu[4], gur[4], gut[4], nur[3], run[3], nut[3], tun[3], tut[3],
nu[2], ur[2], tu[2],