????????
      +---------
RMUPE | ETTPTQHY
       -RMUPE
        =====
        RUMNFQ
       -RFYWJU
        ======
         GNGEPH
        - HUYRQ
         ======
          PHGHRY
         -PRTHPU
          ======
          ??????

base: 14
letters: EFGHJMNPQRTUWY
difficulty: medium