????????
      +---------
JQMGN | QRYNMJRM
       -JQMGN
        =====
        FJNNHJ
       -FTUUHX
        ======
         MNTGGR
        -FLQRHU
         ======
          PXYFRM
         -PJQNPM
          ======
          ??????

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: hard
attributes: deliberative
missing: W