package de.codegym.task.task18.task1807;
/*
Kommas zählen
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
FileInputStream inStream = new FileInputStream(reader.readLine());
int counter = 0;
while(inStream.available() > 0){
int data = inStream.read();
if(data == Integer.valueOf(",")){
counter++;
}
}
System.out.println(counter);
reader.close();
inStream.close();
}
}