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Evil · Puzzle #670
6
1
1
8
2
5
6
7
5
8
9
3
8
2
1
2
4
8
7
6
7
3
1
3
"The only way to learn mathematics is to do mathematics." — Paul Halmos
"The only way to learn mathematics is to do mathematics." — Paul Halmos
"The only way to learn mathematics is to do mathematics." — Paul Halmos
"The only way to learn mathematics is to do mathematics." — Paul Halmos