????????
      +---------
QWQXT | MEHFQGFL
       -QWQXT
        =====
        FQMQWG
       -FPQFGN
        ======
         QFFQNF
        -QPYQXG
         ======
           NLENL
          -TXWWW
           =====
           ?????

base: 13
letters: EFGHLMNPQTWXY
difficulty: medium