import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        if(s.charAt(0)!=s.charAt(1)){
            if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            }
        }
        System.out.println("No");
    }
} import java.util.*; util.* java public class Main{
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        if(s.charAt(0)!=s.charAt(1)){
            if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            }
        }
        System.out.println("No");
    }
} Main public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        if(s.charAt(0)!=s.charAt(1)){
            if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            }
        }
        System.out.println("No");
    } main {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        if(s.charAt(0)!=s.charAt(1)){
            if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            }
        }
        System.out.println("No");
    } Scanner in = new Scanner(System.in); in new Scanner(System.in) String s = in.next(); s in.next() in.next in if(s.charAt(0)!=s.charAt(1)){
            if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            }
        } s.charAt(0)!=s.charAt(1) s.charAt(0) s.charAt s 0 s.charAt(1) s.charAt s 1 {
            if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            }
        } if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            } s.charAt(2)==s.charAt(3) s.charAt(2) s.charAt s 2 s.charAt(3) s.charAt s 3 {
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            } if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                } s.charAt(4)==s.charAt(5) s.charAt(4) s.charAt s 4 s.charAt(5) s.charAt s 5 {
                    System.out.println("Yes");return;
                } System.out.println("Yes") System.out.println System.out System System.out "Yes" return; 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 in = new Scanner(System.in);
        String s = in.next();
        if(s.charAt(0)!=s.charAt(1)){
            if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            }
        }
        System.out.println("No");
    }
} public class Main{
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        if(s.charAt(0)!=s.charAt(1)){
            if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            }
        }
        System.out.println("No");
    }
} Main
import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        if(s.charAt(0)!=s.charAt(1)){
            if(s.charAt(2)==s.charAt(3)){
                if(s.charAt(4)==s.charAt(5)){
                    System.out.println("Yes");return;
                }
            }
        }
        System.out.println("No");
    }
}