????????
      ----------
CGRGW ) GUCPCTQT
       -PWPQF
        =====
         GGUWT
        -PWPQF
         =====
         TUPXCQ
        - MUWTC
         ======
          CQPUTT
         -CTQTXU
          ======
          ??????

base: 12
symbols: CFGMPQRTUWXY
difficulty: hard
missing: Y