????????
      +---------
TGWTP | HHWYTUFL
       -LWWFX
        =====
         WNTHU
        -YUUNF
         =====
          RWLPF
         -RQWJR
          =====
           UYNPL
          -HJHYW
           =====
           ?????

base: 15
letters: FGHJLMNPQRTUWXY
difficulty: hard
hints: G << R
missing: M