AUQC
      ----------
 CQCC ) AUNYTFUT
       -FCECU
        =====
         UQYAF
        -ECFCA
         =====
          QQACU
         -UCYCF
          =====
           CFTNT
          -QCTCY
           =====
            FCNC

base: 10
symbols: ACEFNQTUXY
difficulty: intermediate
missing: X