import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
         String s = scan.next();
         int count=0;
         if(s.charAt(2)==s.charAt(3)){
             count++;
         }
         if(s.charAt(4)==s.charAt(5)){
            count++;
        }
        if(count==2){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        }
        }
    }
/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