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);
}
}
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