import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String scan = scanner.nextLine();
        String[] str = scan.split(" ");
        int length = str[str.length-1].length();
        System.out.println(length);
    }
}