????????
      +---------
XJJHN | HLNQTHTE
       -TENQE
        =====
        WJNNPH
       -WUULNF
        ======
         UPFHXT
        -UFYLLU
         ======
          UJLNLE
         -UWTEFX
          ======
          ??????

base: 14
letters: EFGHJLNPQTUWXY
difficulty: hard
missing: G