import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sn = new Scanner(System.in);
    
    int cnt = 0;
    String str = null;
    str = sn.nextLine();
    
    char[] c = str.toCharArray();
    
    if(c[2] == c[3]) {
      cnt++;
    } else {
      System.out.print("No");
      return;
    }
       
    if(c[4] == c[5]) {
      cnt++;
    } else {
      System.out.print("No");
      return;
    }
    
    if(cnt == 2) {
		System.out.print("Yes");
    }
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz