????????
      ----------
HHJJY ) QCXTTQRH
       -HHJJY
        =====
        URWHHQ
       -TQXTTH
        ======
         XPPPUR
        -XXXCCF
         ======
          XRHJTH
         - HHJJY
          ======
          ??????

base: 12
symbols: CFHJPQRTUWXY
difficulty: medium