/**
 * Find the art style(s) that all three artists have in common.
 *
 * @param artist1 A set of art styles of artist 1.
 * @param artist2 A set of art styles of artist 2.
 * @param artist3 A set of art styles of artist 3.
 * @return A set containing the art style(s) common to all three artists.
 */
fun findArtStyle(artist1: Set<String>, artist2: Set<String>, artist3: Set<String>): Set<String> {

    val commonStyles = artist1.intersect(artist2).intersect(artist3)
    return commonStyles
}
/**
 * Find the art style(s) that all three artists have in common.
 *
 * @param artist1 A set of art styles of artist 1.
 * @param artist2 A set of art styles of artist 2.
 * @param artist3 A set of art styles of artist 3.
 * @return A set containing the art style(s) common to all three artists.
 */
fun findArtStyle(artist1: Set<String>, artist2: Set<String>, artist3: Set<String>): Set<String> {
/**
 * Find the art style(s) that all three artists have in common.
 *
 * @param artist1 A set of art styles of artist 1.
 * @param artist2 A set of art styles of artist 2.
 * @param artist3 A set of art styles of artist 3.
 * @return A set containing the art style(s) common to all three artists.
 */
fun findArtStyle(artist1: Set<String>, artist2: Set<String>, artist3: Set<String>): Set<String> {

    val commonStyles = artist1.intersect(artist2).intersect(artist3)
    return commonStyles
}