RPHP
      +---------
HTWLX | JFJUHMWQ
       -WRLJX
        =====
        HGJTPM
       -HGYWUW
        ======
          QLWQW
         -HTWLX
          =====
          HGLXRQ
         -HGYWUW
          ======
            RWHT

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