package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	var input string
	sc := bufio.NewScanner(os.Stdin)
	for {
		fmt.Print("input: ")
		sc.Scan()
		input = sc.Text()

		exit(input)

		fmt.Printf("output: %s\n", input)
	}
}

func exit(input string) {
	if input == "exit" {
		os.Exit(0)
	}
}