package main

import "fmt"
import "time"

func pinger(c chan string) {
	c <- "ping"
}
func ponger(c1 chan string, c2 chan string) {
	<-c1
	c2 <- "pong"
}
func printer(c chan string) {
	msg := <-c
	fmt.Println(msg)
	time.Sleep(time.Second)
}

func main() {
	pingChan, pongChan := make(chan string), make(chan string)

	go pinger(pingChan)
	go ponger(pingChan, pongChan)
	go printer(pongChan)

	var input string
	fmt.Scanln(&input)

}