0 1
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2 1
2 1
2 1
5 1
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2 1
3 1
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2 1
2 1
2 1
-7 1
5 1
-2 1
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5 1
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-1 1
1 1
2 1
-2 1
-1 1
-2 1
2 1
3 1
-2 1
2 1
2 1
-2 1
2 1
