/**
 * This helper function takes a tuple representing a musician and returns a set of instruments possessed 
 * by the musician.
 *
 * @param musician A tuple representing a musician, where the first element is their name and the second 
 * element is a tuple of instruments possessed by them.
 * @return A set of instruments possessed by the musician.
 */
fun getInstruments(musician: Pair<String, Set<String>>): Set<String> {

    TODO()
}
/**
 * This helper function takes a tuple representing a musician and returns a set of instruments possessed 
 * by the musician.
 *
 * @param musician A tuple representing a musician, where the first element is their name and the second 
 * element is a tuple of instruments possessed by them.
 * @return A set of instruments possessed by the musician.
 */
fun getInstruments(musician: Pair<String, Set<String>>): Set<String> {
/**
 * This helper function takes a tuple representing a musician and returns a set of instruments possessed 
 * by the musician.
 *
 * @param musician A tuple representing a musician, where the first element is their name and the second 
 * element is a tuple of instruments possessed by them.
 * @return A set of instruments possessed by the musician.
 */
fun getInstruments(musician: Pair<String, Set<String>>): Set<String> {

    TODO()
}