P2
# Average over 7x7 square.
7 7
98
50 50 50 50 50 50 50
50 50 50 50 50 50 50
50 50 50 50 50 50 50
50 50 50 50 50 50 50
50 50 50 50 50 50 50
50 50 50 50 50 50 50
50 50 50 50 50 50 50