java

import java.util.*;
public class Main{
    public static void main(String[] arg){
        Scanner s=new Scanner(System.in);
        while(s.hasNextLine()){
            String input1=s.nextLine();
            String input=input1.replaceAll("([A-Z]+)","");
            System.out.println(input1.length()-input.length());
        }
    }
}