????????
      ----------
CQQGC ) MMCQUQEW
       -CQQGC
        =====
        RWJGNQ
       -RLCNGC
        ======
         WGLMWE
        -WWJUCL
         ======
          FWFQEW
         -FFRGUL
          ======
          ??????

base: 12
symbols: CEFGJLMNQRUW
difficulty: hard