using System;

using System.Collections;

​

public class Program

{

    public void Isomorphic(string str1,string str2) 

    {   

    Hashtable tabl1=new Hashtable();

    Hashtable tabl2=new Hashtable();

        int count1=0;

        int count2=0;

        char[] ch=str1.ToCharArray();

        char[] ch1=str2.ToCharArray();

        for(int i=0;i<ch.Length;i++)

        {

            if(!tabl1.ContainsKey(ch[i]))

            {

                Console.WriteLine(ch[i]);

                tabl1.Add(ch[i],1); 

            }

        }

        Console.WriteLine();

        for(int i=0;i<ch1.Length;i++)

        {

            if(!tabl2.ContainsKey(ch1[i]))

            {

                Console.WriteLine(ch1[i]);

                tabl2.Add(ch1[i],1);    

            }

        }

        if(tabl1.Count==tabl2.Count)

        {

            Console.WriteLine("Yes");

        }

        else

        {

            Console.WriteLine("No");

        }

    }

    public static void Main()

    {

        string str1="aab";

        string str2="xxy";

        Program p = new Program();

        p.Isomorphic(str1,str2);

    }

}