MRM
      +---------
WEJRM | MEGEYWGT
       -CWYCTF
        ======
         EWQRQG
        -EEYTGT
         ======
          MCMCET
         -CWYCTF
          ======
           CTJCF

base: 12
letters: CEFGJMQRTWXY
difficulty: hard
missing: X