using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _5.Magic_exchangeable_words
{
    class Program
    {
        static void Main(string[] args)
        {
            var words = Console.ReadLine().Split(' ').ToList();
            var firstWord = words[0];
            var secondWord = words[1];
            var KeysAndValues = new Dictionary<char, char>();

            if (firstWord.Length == secondWord.Length)
            {
                for (int i = 0; i < firstWord.Length; i++)
                {
                    if (!KeysAndValues.ContainsKey(firstWord[i]))
                    {
                        KeysAndValues.Add(firstWord[i], secondWord[i]);
                    }
                    else
                    {
                        if (KeysAndValues[firstWord[i]] != secondWord[i])
                        {
                            Console.WriteLine("false");
                            return;
                        }
                    }
                }
                Console.WriteLine("true");
            }
            else if (firstWord.Length > secondWord.Length)
            {
                for (int i = 0; i < secondWord.Length; i++)
                {
                    if (!KeysAndValues.ContainsKey(firstWord[i]))
                    {
                        KeysAndValues.Add(firstWord[i], secondWord[i]);
                    }
                    else
                    {
                        if (KeysAndValues[firstWord[i]] != secondWord[i])
                        {
                            Console.WriteLine("false");
                            return;
                        }
                    }
                }

                for (int i = secondWord.Length; i < firstWord.Length; i++)
                {
                    if (!KeysAndValues.ContainsKey(firstWord[i]))
                    {
                        Console.WriteLine("false");
                        return;
                    }
                }
                Console.WriteLine("true");
            }
            else
            {
                for (int i = 0; i < firstWord.Length; i++)
                {
                    if (!KeysAndValues.ContainsKey(firstWord[i]))
                    {
                        KeysAndValues.Add(firstWord[i], secondWord[i]);
                    }
                    else
                    {
                        if (KeysAndValues[firstWord[i]] != secondWord[i])
                        {
                            Console.WriteLine("false");
                            return;
                        }
                    }
                }

                for (int i = firstWord.Length; i < secondWord.Length; i++)
                {
                    if (!KeysAndValues.ContainsValue(secondWord[i]))
                    {
                        Console.WriteLine("false");
                        return;
                    }
                }
                Console.WriteLine("true");
            }
        }
    }
}