import java.util.Scanner;

/**
 * HJ92 在字符串中找出连续最长的数字串 - 中等
 */
public class HJ092 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            String str = sc.nextLine();
            String[] strs = str.split("[^0-9]+");
            int max = 0;
            for (String s : strs) {
                if (s.length() > max) {
                    max = s.length();
                }
            }
            StringBuffer sb = new StringBuffer();
            for (String s : strs) {
                if (s.length() == max) {
                    sb.append(s);
                }
            }
            System.out.println(sb.append(",").append(max));
        }
        sc.close();
    }
}