TTGN
      +---------
TQEXX | TWGXYXWL
       -TQEXX
        =====
         TYFWX
        -TQEXX
         =====
          EWLFW
         -XQNGM
          =====
          TTLXTL
         -TTHYNG
          ======
            WEQW

base: 13
letters: EFGHJLMNQTWXY
difficulty: medium
missing: J