????????
      +---------
UUUMQ | MGLMVZJT
       -UUUMQ
        =====
        WLMQLZ
       -WVVLZL
        ======
          YGQWJ
         -PPRZJ
          =====
          WPWJNT
         -WXXRMM
          ======
          ??????

base: 16
letters: GHJLMNPQRTUVWXYZ
difficulty: medium
hints: G << T, J < X
missing: H