package main

import "fmt"

func worker(id int, ch chan<- string) {
    ch <- fmt.Sprintf("worker %d done", id)
}

func main() {
    ch := make(chan string, 3)
    for i := 0; i < 3; i++ {
        go worker(i, ch)
    }
    for i := 0; i < 3; i++ {
        fmt.Println(<-ch)
    }
}