package com.core.java7;

public class Main {

	public static void main(String[] args) {

		String st = "abcotetf";
		int count = 0;

		for(int i=0; i<st.length()-3 ; i++){

			if("co".compareTo(st.substring(i, i+2))==0 && "e".compareTo(st.substring(i+3,i+4)) == 0){
				count++;
			}
		}

		System.out.println(count);
		}
}