/**
 * Given two lists, return the first common element found between them.
 */
fun findFirstCommonElement(list1: List<Any>, list2: List<Any>): Any? {

    for (element in list1) {
        if (element in list2) {
            return element
        }
    }
    return null
}
/**
 * Given two lists, return the first common element found between them.
 */
fun findFirstCommonElement(list1: List<Any>, list2: List<Any>): Any? {
/**
 * Given two lists, return the first common element found between them.
 */
fun findFirstCommonElement(list1: List<Any>, list2: List<Any>): Any? {

    for (element in list1) {
        if (element in list2) {
            return element
        }
    }
    return null
}