????????
      +---------
GYHXR | GJENHMWU
       -GYHXR
        =====
         LWLJM
        -GYHXR
         =====
         GLNERW
        -GGXLFJ
         ======
          GHMJGU
         -GLUJGH
          ======
          ??????

base: 14
letters: EFGHJLMNQRUWXY
difficulty: hard
missing: Q