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package main
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import (
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"fmt"
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"math/rand"
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"os"
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)
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func main() {
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fmt.Println("stdin: ", os.Stdin.Fd())
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fmt.Println("stdout:", os.Stdout.Fd())
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fmt.Println("stderr:", os.Stderr.Fd())
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fmt.Println("pseudorandom number:", rand.Int31())
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}
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