????????
      +---------
MFWFF | JYGFHTFH
       -FWNMW
        =====
        RGUUUT
       -RHERRY
        ======
         MUMWYF
        -MMFUYN
         ======
           FTEWH
          -FWNMW
           =====
           ?????

base: 12
letters: EFGHJMNRTUWY
difficulty: medium