import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力

		// 文字列の入力
		String s = sc.next();
      char threend = s.charAt(2);
      char fourth = s.charAt(3);
      char fiveth = s.charAt(4);
      char sixth = s.charAt(5);
      
      if ((threend == fourth) && (fiveth == sixth))
		// 出力
      {
		System.out.println("Yes");
      }
      else
      {
      System.out.println("No");
      }
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力

		// 文字列の入力
		String s = sc.next();
      char threend = s.charAt(2);
      char fourth = s.charAt(3);
      char fiveth = s.charAt(4);
      char sixth = s.charAt(5);
      
      if ((threend == fourth) && (fiveth == sixth))
		// 出力
      {
		System.out.println("Yes");
      }
      else
      {
      System.out.println("No");
      }
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力

		// 文字列の入力
		String s = sc.next();
      char threend = s.charAt(2);
      char fourth = s.charAt(3);
      char fiveth = s.charAt(4);
      char sixth = s.charAt(5);
      
      if ((threend == fourth) && (fiveth == sixth))
		// 出力
      {
		System.out.println("Yes");
      }
      else
      {
      System.out.println("No");
      }
	} main {
		Scanner sc = new Scanner(System.in);
		// 整数の入力

		// 文字列の入力
		String s = sc.next();
      char threend = s.charAt(2);
      char fourth = s.charAt(3);
      char fiveth = s.charAt(4);
      char sixth = s.charAt(5);
      
      if ((threend == fourth) && (fiveth == sixth))
		// 出力
      {
		System.out.println("Yes");
      }
      else
      {
      System.out.println("No");
      }
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc char threend = s.charAt(2); threend s.charAt(2) s.charAt s 2 char fourth = s.charAt(3); fourth s.charAt(3) s.charAt s 3 char fiveth = s.charAt(4); fiveth s.charAt(4) s.charAt s 4 char sixth = s.charAt(5); sixth s.charAt(5) s.charAt s 5 if ((threend == fourth) && (fiveth == sixth))
		// 出力
      {
		System.out.println("Yes");
      }
      else
      {
      System.out.println("No");
      } (threend == fourth) && (fiveth == sixth) (threend == fourth) threend fourth (fiveth == sixth) fiveth sixth {
		System.out.println("Yes");
      } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
      System.out.println("No");
      } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力

		// 文字列の入力
		String s = sc.next();
      char threend = s.charAt(2);
      char fourth = s.charAt(3);
      char fiveth = s.charAt(4);
      char sixth = s.charAt(5);
      
      if ((threend == fourth) && (fiveth == sixth))
		// 出力
      {
		System.out.println("Yes");
      }
      else
      {
      System.out.println("No");
      }
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力

		// 文字列の入力
		String s = sc.next();
      char threend = s.charAt(2);
      char fourth = s.charAt(3);
      char fiveth = s.charAt(4);
      char sixth = s.charAt(5);
      
      if ((threend == fourth) && (fiveth == sixth))
		// 出力
      {
		System.out.println("Yes");
      }
      else
      {
      System.out.println("No");
      }
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力

		// 文字列の入力
		String s = sc.next();
      char threend = s.charAt(2);
      char fourth = s.charAt(3);
      char fiveth = s.charAt(4);
      char sixth = s.charAt(5);
      
      if ((threend == fourth) && (fiveth == sixth))
		// 出力
      {
		System.out.println("Yes");
      }
      else
      {
      System.out.println("No");
      }
	}
}