????????
      +---------
FMGWN | PLHHJLPG
       -FMGWN
        =====
        FLPLNL
       -FWGFJY
        ======
         FMQRMP
        -FLGRYT
         ======
          FTUFLG
         -FWGFJY
          ======
          ??????

base: 14
letters: FGHJLMNPQRTUWY
difficulty: medium