import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scnr = new Scanner(System.in);
        String userText;
        int numPun = 0;
        userText = scnr.nextLine();
        for (int i = 0; i < userText.length(); i++) {
            char current = userText.charAt(i);
            if (current != ' ' && current != ',' && current != '.') {
                numPun++;
            }
        }
        System.out.println(numPun);
    }
}