import java.util.Scanner;
import java.util.regex.*;

public class Main
{
	public static void main (String[] args)
	{
		String string;
		int sentenceCount = 0;
		Pattern pattern = Pattern.compile("[.!?]+");
		Matcher matcher;
		Scanner scanner = new Scanner(System.in);
		
		string = scanner.nextLine();
		matcher = pattern.matcher(string);

		while (matcher.find()) sentenceCount++;
		
		System.out.println(sentenceCount);
	}
}