burg[7], grub[7], bund[6], mund[6], drum[6], dung[5], rund[4],
bum[7], bug[6], mud[5], mur[5], rum[5], gnu[4], gur[4], dun[3], und[3], dur[3], nur[3], run[3],
um[4], du[2], ud[2], nu[2], ur[2],
