package main

import (
  "fmt"
  "strconv"
  "strings"
  "time"
)

func main() {
  nozomi := make(chan string)
  nico   := make(chan string)

  go generateNozomiMessage((chan<- string)(nozomi), 9)
  go generateNicoMessage((chan<- string)(nico), 2)

  for {
    select {
    case message := <-nozomi:
      fmt.Println(message)
    case message := <-nico:
      fmt.Println(message)
    }
  }
}

func generateNozomiMessage(ch chan<- string, people int64) {
  ch <- "うちを入れて" + strconv.FormatInt(people, 10) + "人や"
  time.Sleep(777 * time.Millisecond)
  generateNozomiMessage(ch, people + 1)
}

func generateNicoMessage(ch chan<- string, times int) {
  ch <- strings.Repeat("にっこ", times) + "にー♪"
  time.Sleep(1000 * time.Millisecond)
  generateNicoMessage(ch, times + 1)
}