Debug

console.log(2)


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console.log(1)
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console.log(2)
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console.log(3)
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console.log(4)


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console.log(1)
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console.log(2)
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console.log(3)
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console.log(4)


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console.log(1)
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console.log(2)
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console.log(3)
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console.log(600000)


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console.log(1)
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console.log(2)
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console.log(1)
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console.log(3)