import java.util.Scanner;

public class Solver {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);

		while(input.hasNext()){
			String s = input.nextLine();
			int count = 0;
			boolean isWord=false;
			for(int i = 0; i < s.length() - 1; ++i){
				if(Character.isLetter(s.charAt(i+1))){
					isWord=true;
				}
				else{
					if(isWord){
						isWord=false;
						count++;
					}
				}
			}
			System.out.println(count);
		}
	}
}