import java.io.; import java.util.; /* *@Author : Rehan *Using Stream API in Java8 */ public class SolutionDump {

public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    String s = scan.nextLine();
    scan.close();
    if (s.trim().length()==0 || s.trim().length()>400000){
    System.out.println(0);
    return;
    }
    s=s.trim();
    // Write your code here.
    List<String> count = Stream
    .of(s.split("[^(a-zA-Z)]+")).collect(Collectors.toList());

    System.out.println(count.size());
            //to print the expected list
    \Stream.of(s.split("[^(a-zA-Z)]+")).forEach(System.out::println);

}

}