????????
      +---------
FQRQN | UYGGTWNG
       -FQRQN
        =====
        WNGLWW
       -YXNRWX
        ======
         HXLRNN
        -HPMUFF
         ======
          GLYPQG
         -GYXXPT
          ======
          ??????

base: 14
letters: FGHLMNPQRTUWXY
difficulty: hard