EEGA
      +---------
ANNNW | TNYGGNGT
       -ANNNW
        =====
         WAPJN
        -ANNNW
         =====
         GXTNAG
        -EPJJJT
         ======
          PPJJYT
         -PJNNTJ
          ======
           ENNNP

base: 10
letters: AEGJNPTWXY
difficulty: medium
restrictions: no multiplication