TYY
      +---------
UFTFU | MWPGWGFW
       -RUXQXR
        ======
         QUTRFF
        -QMUXUM
         ======
          QGWXTW
         -QMUXUM
          ======
           YQGUF

base: 11
letters: FGMPQRTUWXY
difficulty: hard