????????
      +---------
GMLEL | EECUHMUL
       -WCHME
        =====
        GGEWGM
       -GQXWHL
        ======
          EXCEU
         -WCHME
          =====
          GCEHHL
         -GCEQXE
          ======
          ??????

base: 10
letters: CEGHLMQUWX
difficulty: intermediate