????????
      +---------
YMHER | MHQEPTTM
       -THHPL
        =====
         HCCHT
        -EHHWT
         =====
         CCYLQT
        -CQMHCY
         ======
           LLHYM
          -PMHMN
           =====
           ?????

base: 12
letters: CEHLMNPQRTWY
difficulty: intermediate