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package main
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import (
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"fmt"
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)
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func a(c chan bool) {
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for i := 0; i < 50; i++ {
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fmt.Print("a")
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}
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c <- true
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}
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func b(c chan bool) {
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for i := 0; i < 50; i++ {
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fmt.Print("b")
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}
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c <- true
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}
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func main() {
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c := make(chan bool)
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go a(c)
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go b(c)
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<- c
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<- c
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fmt.Println("end main()")
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}
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