QQE
      +--------
QQWGR | QREYGPW
       -QQWGR
        =====
         QJRTP
        -QQWGR
         =====
          CYWYW
         -EYTPQ
          =====
           TWWJ

base: 11
letters: CEGJPQRTWXY
difficulty: medium
missing: X