YVJJ
      +---------
VYMPU | YLMLGPTY
       -YRJVW
        =====
         VLTWP
        -VYMPU
         =====
          JZRMT
         -JQGNX
          =====
           JPWQY
          -JQGNX
           =====
            VVGR

base: 16
letters: GHJLMNPQRTUVWXYZ
difficulty: hard
missing: H