NRW
      ----------
CPCLL ) YQYXYYRN
       -YWRPEX
        ======
         EWMXCR
        -EMRPYE
         ======
          NNYEWN
         -NMWYPN
          ======
           YRPQM

base: 11
symbols: CELMNPQRWXY
difficulty: intermediate
restrictions: no multiplication