YCTF
      ----------
 FTFF ) YCUWQNCQ
       -NFXFC
        =====
         CTWYN
        -XFNFY
         =====
          TTYFC
         -CFWFN
          =====
           FNQUQ
          -TFQFW
           =====
            NFUF

base: 10
symbols: CFHNQTUWXY
difficulty: intermediate
missing: H