????????
      +---------
WCCJW | RURFJWJM
       -WCCJW
        =====
        CLFCLW
       -CEFRFE
        ======
          LRWRJ
         -YNNRY
          =====
          NWCLRM
         -NNRMEN
          ======
          ??????

base: 11
letters: CEFJLMNRUWY
difficulty: intermediate