XEP
      +---------
MEEYL | QPEJMQUQ
       -QGQJLX
        ======
         GMJXNU
        -XPXJQE
         ======
          MUXMPQ
         -MLPGEP
          ======
           GGLLY

base: 11
letters: EGJLMNPQUXY
difficulty: intermediate
restrictions: no multiplication