gistfile1.txt

func separateString(str, seporator string, count int) string {
	rs := []rune(str)
	log.Println("rs = ", rs)
	srs := []rune(seporator)
	log.Println("srs = ", srs)

	for i := 0; i * (count + len(srs)) < len(rs)-count; i++ {
		rs = append(rs[:i * (count + len(srs)) + count] ,append(srs, rs[i * (count + len(srs)) + count :]...)...)
	}

	return string(rs)
}