using System;
using System.Collections.Generic;


namespace magic
{
    public class Program
    {
        static void Main(string[] args)
        {
            var input = Console.ReadLine().Split(' ');
            var first = input[0];
            var second = input[1];

            Console.WriteLine(AreEqual(first, second) ? "true" : "false");
        }

        private static bool AreEqual(string a, string b)
        {
            var areEqual = true;
            var data = new Dictionary<char, char>();
            if (a.Length == b.Length)
            {
                for (var i = 0; i < a.Length; i++)
                {
                    var firstChar = a[i];
                    var secondChar = b[i];
                    if (!data.ContainsKey(firstChar))
                    {
                        data.Add(firstChar, secondChar);
                    }
                    else
                    {
                        if (!data.ContainsValue(secondChar))
                        {
                            areEqual = false;
                        }
                    }
                }
            }
            else
            {
                areEqual = false;
            }

            return areEqual;
        }
    }
}