YTGE
      +---------
PMPET | MTTFTTYY
       -GMMFA
        =====
        PGGNWT
       -PYFANP
        ======
          AYWEY
         -FNAMF
          =====
          PWMWAY
         -PWPMPW
          ======
            YAFP

base: 10
letters: AEFGMNPTWY
difficulty: intermediate
restrictions: no multiplication