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package main
import (
"fmt"
"math/rand"
"os"
"strings"
)
func main() {
// package os, fmt
fmt.Println("stdin: ", os.Stdin.Name())
fmt.Println("stdout:", os.Stdout.Name())
fmt.Println("stderr:", os.Stderr.Name())
// package math/rand
fmt.Println("pseudorandom number:", rand.Int31())
// package strings
fmt.Println("strings.IndexByte:", strings.IndexByte("asdf", 'd'))
fmt.Println("strings.Replace:", strings.Replace("An example string", " ", "-", -1))
}
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