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Easy · Puzzle #489
9
3
2
1
6
7
4
5
6
2
7
4
8
9
7
2
3
9
3
1
6
7
2
4
1
3
4
2
9
8
2
9
4
7
1
1
5
8
6
4
7
3
6
5
"My brain is open." — Paul Erdős
"My brain is open." — Paul Erdős
"Science is a way of thinking much more than it is a body of knowledge." — Carl Sagan
"Science is a way of thinking much more than it is a body of knowledge." — Carl Sagan