dug[8], gum[8], dum[7], mud[7], kum[7], dup[7], pud[7], kup[7], puk[7], pum[7], gur[7], rug[7], dur[6], rud[6], urd[6], kur[6], mru[6], mur[6], rum[6],
gu[6], ud[5], ku[5], mu[5],