????????
      +---------
JNWWH | WWGNGNGE
       -JNWWH
        =====
        JXEFMN
       -JFYYWM
        ======
         JJTJFG
        -JPNPMY
         ======
           EJPFE
          -HEYPE
           =====
           ?????

base: 13
letters: EFGHJLMNPTWXY
difficulty: medium
missing: L