AFQ
       ----------
ARRUXW ) QARCWCWQ
        -XXCRTA
         ======
         ARARXAW
        -ACFWAYC
         =======
          AUTUAAQ
         -AATQQCQ
          =======
            FCUQY

base: 10
symbols: ACFQRTUWXY
difficulty: intermediate
restrictions: no multiplication