import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String input = scan.nextLine();
        if (input.length() > 5000) {
            System.out.println("长度超过5000!");
            return;
        }
        // 索引从0开始,所以要加1,并且避免无空格情况
        int lastSpaceIndex = input.trim().lastIndexOf(" ")+1;
        System.out.println(input.trim().length() - lastSpaceIndex);
    }
}