import java.io.*;
public class arvestus{
  public static void main(String argumendid[]) throws IOException{
	int a=0;
    BufferedReader sisse=new BufferedReader(
	new FileReader("nimed1.txt"));
  String rida=sisse.readLine();
    while(rida!=null){
	if(rida.startsWith("k")){
           a=a+1;}
     rida=sisse.readLine();
    }
 System.out.println(a);
    sisse.close();
  }
}