????????
      +---------
XMEWX | XWFQWHLX
       -XMEWX
        =====
         PNHQH
        -EWPTE
         =====
          QTTNL
         -EWPTE
          =====
          LEWGQX
         -LNXXMM
          ======
          ??????

base: 13
letters: EFGHJLMNPQTWX
difficulty: medium
missing: J