????????
      ----------
YLCLH ) LMCCQHCP
       -YLCLH
        =====
        MMLCCH
       -QLLMJP
        ======
         PFPLQC
        -MYLFCJ
         ======
          PHJPLP
         -PMJJCM
          ======
          ??????

base: 9
symbols: CFHJLMPQY
difficulty: medium