????????
      +---------
FHRNW | XURHRTMY
       -LYMUF
        =====
         RFEMT
        -HLUPE
         =====
          MHMYM
         -WUWMM
          =====
          FEJTPY
         -FNEWHE
          ======
          ??????

base: 14
letters: EFHJLMNPRTUWXY
difficulty: hard