???????
      +--------
RJNGJ | JNNQFNJ
       -RJNGJ
        =====
        QFGQRN
       -QNRRGR
        ======
         QNLRYJ
        - RJNGJ
         ======
         ??????

base: 9
letters: FGJLNQRWY
difficulty: medium
missing: W