????????
      +---------
REYNF | JEETLHTF
       -REYNF
        =====
        YULYEH
       - REYNF
        ======
         LJFQTT
        -LGQGHR
         ======
          HEWUJF
         -HYLURG
          ======
          ??????

base: 13
letters: EFGHJLNQRTUWY
difficulty: intermediate