ProgMasters 13 - Count Quadruples

import java.util.*;

public class Main {
	public static void main(String[] args) {

	Scanner scanner = new Scanner(System.in);
    String input = scanner.nextLine();

    int szamol = 0;

    for(int i = 0;i < input.length() - 3; i++) {
      char c1 = input.charAt(i);
      char c2 = input.charAt(i + 1);
      char c3 = input.charAt(i + 2);
      char c4 = input.charAt(i + 3);

      if(c1 == c2 && c2 == c3 && c3 == c4) {
        szamol++;
      }
    }

    System.out.println(szamol);

    scanner.close();
	}
}