????????
      +---------
UFJUJ | EFHEJYLE
       -UFJUJ
        =====
         YYXNY
        -FGRRR
         =====
         XWEEUL
        -XXLGNL
         ======
          UJJUNE
         -UHRLLW
          ======
          ??????

base: 13
letters: EFGHJLNRTUWXY
difficulty: medium
missing: T