import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc =new Scanner(System.in);
    String s =sc.next();
    String x[]=s.split("",0);
    if(x[2].equals(x[3])){
      if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");}}
    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);
    String s =sc.next();
    String x[]=s.split("",0);
    if(x[2].equals(x[3])){
      if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");}}
    else{System.out.println("No");}
  }
} Main public static void main(String[] args){
    Scanner sc =new Scanner(System.in);
    String s =sc.next();
    String x[]=s.split("",0);
    if(x[2].equals(x[3])){
      if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");}}
    else{System.out.println("No");}
  } main {
    Scanner sc =new Scanner(System.in);
    String s =sc.next();
    String x[]=s.split("",0);
    if(x[2].equals(x[3])){
      if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");}}
    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 String x[]=s.split("",0); x s.split("",0) s.split s "" 0 if(x[2].equals(x[3])){
      if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");}}
    else{System.out.println("No");} x[2].equals(x[3]) x[2].equals x[2] x 2 x[3] x 3 {
      if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");}} if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");} x[4].equals(x[5]) x[4].equals x[4] x 4 x[5] x 5 {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" {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);
    String s =sc.next();
    String x[]=s.split("",0);
    if(x[2].equals(x[3])){
      if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");}}
    else{System.out.println("No");}
  }
} public class Main{
  public static void main(String[] args){
    Scanner sc =new Scanner(System.in);
    String s =sc.next();
    String x[]=s.split("",0);
    if(x[2].equals(x[3])){
      if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");}}
    else{System.out.println("No");}
  }
} Main
import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc =new Scanner(System.in);
    String s =sc.next();
    String x[]=s.split("",0);
    if(x[2].equals(x[3])){
      if(x[4].equals(x[5])){System.out.println("Yes");}
      else{System.out.println("No");}}
    else{System.out.println("No");}
  }
}
