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using concurrent
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class Main
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{
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public static Void main ()
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{
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echo ("Enter a time to sleep: ")
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input := Env.cur.in.readLine
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try
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{
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time := Duration.fromStr (input)
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echo ("sleeping ...")
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Actor.sleep (time)
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echo ("awake!")
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}
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catch
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{
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echo ("Invalid time entered")
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}
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}
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}
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