????????
      +---------
EFEJE | GUNYEXJL
       -EFEJE
        =====
         XYERX
        -QLUFP
         =====
         EEYGPJ
        - WWFUL
         ======
          EYPWEL
         -EYPXQW
          ======
          ??????

base: 13
letters: EFGJLNPQRUWXY
difficulty: medium