import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String s = sc.nextLine(); String[] split = s.split("[^0-9]"); String tmp = ""; for (int i = 0; i < split.length; i++){ if (tmp.length() < split[i].length()){ tmp = split[i]; } } System.out.println(tmp); } }