????????
      ----------
GNMJF ) FRGRGWWT
       -NWJNG
        =====
        GQFEQW
       - RFQQR
        ======
         GQCRRW
        - RFQQR
         ======
          GMRWRT
         -GGRTCE
          ======
          ??????

base: 11
symbols: CEFGJMNQRTW
difficulty: medium