import java.util.Scanner;
class Main{
public static void main(String[]args){

Scanner sc=new Scanner(System.in);
  String moji=sc.nextLine();
  
  char[] S=new char[6];
  for(int i=0; i<6; i++){
  S[i]=moji.charAt(i);
  }
  if(S[2]==S[3] && S[4]==S[5]){
    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