????????
      +---------
GFNHM | TPXQGHQW
       -GFNHM
        =====
        JHRHNH
       - GFNHM
        ======
         GQWMGQ
        -GWLWXX
         ======
          HWXHPW
         -HPGTWH
          ======
          ??????

base: 14
letters: EFGHJLMNPQRTWX
difficulty: medium
missing: E