package main

import "fmt"

func f(x, y, z chan string) {
	defer close(x)
	a := make(chan bool)
	go func() {
		for i := 0; i < 3; i++ {
			x <- "hi"
		}
		a <- true
	}()

	<-a
	y <- "hello"
	z <- "hola"
}

func main() {
	x, y, z := make(chan string), make(chan string), make(chan string)
	go f(x, y, z)
	go func() {
		for m := range x {
			fmt.Println("m", m)
		}
	}()
	select {
	case b := <-y:
		fmt.Println("b", b)
	case c := <-z:
		fmt.Println("c", c)
	}

	fmt.Println("end")
}