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Easy · Puzzle #373
4
2
5
1
5
6
3
4
1
9
2
7
2
6
5
3
2
3
6
9
4
3
5
9
1
7
2
1
8
2
4
3
6
5
1
3
8
5
2
8
6
4
3
4
9
7
"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