XWFE
    ---------
CLJ ) CQFXQQF
     -LCFC
      ====
       WMQQ
      -JYQY
       ====
        WXEQ
       -WFCC
        ====
         FYWF
        -FWYM
         ====
          JLF

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