buc[8], bud[8], bum[8], umb[8], pub[8], cud[7], cum[7], muc[7], dum[7], mud[7], cup[7], puc[7], dup[7], pud[7], pum[7], pup[7], bru[7], bur[7], cru[6], dur[6], rud[6], urd[6], mru[6], mur[6], rum[6],
bu[6], ud[5], mu[5],