WTUY
      ----------
 YUYY ) WTXHEFTE
       -FYCYT
        =====
         TUHWF
        -CYFYW
         =====
          UUWYT
         -TYHYF
          =====
           YFEXE
          -UYEYH
           =====
            FYXY

base: 10
symbols: CEFHNTUWXY
difficulty: intermediate
missing: N