????????
      +---------
MPUYX | YGUUHFPL
       -GHRUM
        =====
        JFQTGF
       -JGXPFY
        ======
         JUNHQP
        -JXYJQX
         ======
           RYTML
          -UWTPY
           =====
           ?????

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: medium