XYY
      +---------
XGAAQ | MPGPYAMP
       -GAXAYM
        ======
         PXXRXM
        -PLGAQQ
         ======
          PGRYQP
         -PLGAQQ
          ======
            QYAY

base: 9
letters: AGLMPQRXY
difficulty: easy
restrictions: no multiplication