HNW
      +--------
FTWUU | WTNQTNE
       -FTWUU
        =====
        FLPPGN
       -QNGUHW
        ======
         HGEETE
        -HEEHJG
         ======
          HLTTJ

base: 13
letters: EFGHJLNPQTUWX
difficulty: medium
missing: X