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import java.io.*;

import java.util.*;

import java.text.*;

import java.math.*;

import java.util.regex.*;

public class Solution {

public static void main(String[] args) {

Scanner in = new Scanner(System.in);

String s = in.next();

int counter;

if (s.length() == 0) {

counter = 0;

} else {

counter = 1;

for (int i = 1; i < s.length(); i++) {

if (Character.isUpperCase(s.charAt(i))) {

counter++;

}

}

}

System.out.println(counter);

}

}