EJXH
      +---------
FGTJJ | HTTXHEHX
       -FGTJJ
        =====
        YGNEGE
       -GMYFJY
        ======
         YXJJMH
        -YYFPEM
         ======
          TNXXPX
         -YHHYHT
          ======
           GPTGY

base: 11
letters: EFGHJMNPTXY
difficulty: easy
restrictions: no multiplication