ULUU
      ----------
NYFFN ) YFLNUGUR
       -UHFFU
        =====
        NULNFG
       -NUQFFL
        ======
          JFLHU
         -UHFFU
          =====
           ULHFR
          -UHFFU
           =====
            NHFJ

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