LGN
      +---------
JYJUG | LCLYJYLA
       -EYCYEE
        ======
         GLCYGL
        -LGUGNY
         ======
          JLPGUA
         -UJPJYY
          ======
           GNYCN

base: 10
letters: ACEGJLNPUY
difficulty: intermediate
restrictions: no multiplication