????????
      +---------
LRLXQ | FUUXHRTY
       -LRLXQ
        =====
         HHELR
        -PQXFN
         =====
         GRRTLT
        -UNYGLH
         ======
          RXXEUY
         -RYTEEU
          ======
          ??????

base: 13
letters: EFGHLNPQRTUXY
difficulty: intermediate