????????
      +---------
JUMTL | PPYQWRXM
       -YWLGR
        =====
         QNYLR
        -WMQNW
         =====
         TNWGTX
        -TYWYHN
         ======
          HMMHTM
         -HRWNPM
          ======
          ??????

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