????????
      ----------
TUCCN ) QNWCYCMF
       -XFCCM
        =====
         QWCNC
        -XFCCM
         =====
          MCTMM
         -XFCCM
          =====
          TWTMCF
         -TNWCTM
          ======
           ?????

base: 12
symbols: CFMNPQRTUWXY
missing: R P
difficulty: medium
hints: R << P