def colors(col):
    """
    Returns a color. DO NOT MODIFY!!!
    :param col: color number
    :return: String representing a color
    """
    if col == 0:
        return "turquoise"
    elif col == 1:
        return "lightblue"
    elif col == 2:
        return "lightgray"
    elif col == 3:
        return "violet"