????????
      ----------
PCRQY ) YPMQQFCC
       -CRQJQ
        =====
        HHWCTF
       - MJCRT
        ======
         RCUMFC
        -RQJCHQ
         ======
          PRPWPC
         -RUUUMY
          ======
          ??????

base: 12
symbols: CFHJMPQRTUWY
difficulty: hard