????????
      +---------
MMMYG | NRWWYYYN
       -FFFPP
        =====
        LXLPQY
       -LLLLTY
        ======
         MUQRUY
        -MUUHNH
         ======
           QNWMN
          -FFFPP
           =====
           ?????

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: hard
missing: J