PXH
      +--------
UPRLR | YLMJUJW
       -PGNHN
        =====
         NNMYJ
        -NPJHL
         =====
          XLHYW
         -QXFRW
          =====
           FTLT

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