????????
      +---------
FHNXJ | GNWJCEGE
       -GNEWX
        =====
          HXEEG
         -HYFFP
          =====
           HHFCE
          -FHNXJ
           =====
          ??????

base: 12
letters: CEFGHJNPQWXY
missing: Q
difficulty: medium
hints: E << G, X << Q, C << J