JFEM
    ---------
YQX ) YHEJHHE
     -QYEY
      ====
       FWHH
      -XLHL
       ====
        FJMH
       -FEYY
        ====
         ELFE
        -EFLW
         ====
          XQE

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