import java.util.Scanner;
/**
* HJ001 字符串最后一个单词的长度 - 简单
*/
public class HJ001 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
String[] s1 = s.split(" ");
System.out.println(s1[s1.length-1].length());
sc.close();
}
}