using System;

​

public class Program

{

    public static void Main()

    {

        string strOne = Console.ReadLine();

            string strTwo = Console.ReadLine();

            var arrayOne = strOne.ToCharArray();

            var arrayTwo = strTwo.ToCharArray();

            string[] uniqueArray = new string[arrayOne.Length];

            string[] lastArray = new string[arrayOne.Length];

            int count = 0;

            int prevIndex = 0;

            bool foundDuplicate;

            bool existCorresp = true;

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

            {

                for (int j =i+1; j < arrayTwo.Length; j++)

                {

                    if (arrayOne[i] == arrayOne[j] && arrayTwo[i] != arrayTwo[j])

                    {

                        existCorresp = false;

                        break;

                    }

​

                }

                    uniqueArray[count] = Convert.ToString(arrayOne[i]) + " => " + Convert.ToString(arrayTwo[i]);

                    count++;

​

            }

            if (existCorresp == false)

            {

                Console.WriteLine(existCorresp);

            }

            else

            {

                count = 0;

                int len = uniqueArray.Length;

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

                {

                    foundDuplicate = false;

                    for (int j = 0; j < i; j++)

                    {

                        if (uniqueArray[i] == uniqueArray[j] && (i != j))

                        {

                            foundDuplicate = true;

​

                            count++;

                            break;

                        }

​

​

                    }

                    if (foundDuplicate == false)

                    {

                        lastArray[prevIndex] = uniqueArray[i];

                        prevIndex++;

                    }

​

​

​

                }

​

                lastArray[len - count] = "\0";

                if (count > 0)

                {

                    Console.WriteLine("True");

                }

                else

                {

                    Console.WriteLine("False");

                }

                for (int k = 0; k < lastArray.Length; k++)

                {

​

                    if (lastArray[k] != null && lastArray[k] != "\0")

                    {

​

                        Console.WriteLine(lastArray[k]);

                    }

​

                }

            }

​

    }

}