FYHX
      +---------
PYFNM | PXHFXMYM
       -PYFNM
        =====
         UWHJM
        -MHNFM
         =====
         FLJNEY
        -FUNENM
         ======
          PFYWHM
         -PELYFM
          ======
            JNUE

base: 12
letters: EFHJLMNPUWXY
difficulty: medium