MagicExchangeableWords

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

namespace MagicExchangableWords
{
    class MagicExchangableWords
    {
        static void Main(string[] args)
        {
            string[] wordsToCheck = Console.ReadLine().Split(' ').ToArray();

            string firstWord = wordsToCheck[0];
            string secondWord = wordsToCheck[1];

            int shorterStrInd = Math.Min(firstWord.Length, secondWord.Length);

            bool areMagicWords = CheckIfTwoWordsAreExchangable(firstWord, secondWord, shorterStrInd);

            Console.WriteLine(areMagicWords.ToString().ToLower());
        }

        private static bool CheckIfTwoWordsAreExchangable(string firstWord,
                                                          string secondWord,
                                                          int shorterStrInd)
        {
            Dictionary<char, char> magicWords = new Dictionary<char, char>();

            bool areMagicWords = true;
            for (int currSymbol = 0; currSymbol < shorterStrInd; currSymbol++)
            {
                char charFromFirstString = firstWord[currSymbol];
                char charFromSecondString = secondWord[currSymbol];

                if (!magicWords.ContainsKey(charFromFirstString))
                {
                    magicWords[charFromFirstString] = charFromSecondString;
                }
                else if (magicWords[charFromFirstString] != charFromSecondString)
                {
                    areMagicWords = false;
                    break;
                }
            }

            for (int longerStrInd = shorterStrInd; longerStrInd < firstWord.Length; longerStrInd++)
            {
                char charFromFirstLongerStr = firstWord[longerStrInd];

                if (!magicWords.ContainsKey(charFromFirstLongerStr))
                {
                    areMagicWords = false;
                    break;
                }
            }

            for (int longerStrInd = shorterStrInd; longerStrInd < secondWord.Length; longerStrInd++)
            {
                char charFromFirstLongerStr = secondWord[longerStrInd];

                if (!magicWords.ContainsValue(charFromFirstLongerStr))
                {
                    areMagicWords = false;
                    break;
                }
            }

            return areMagicWords;
        }
    }
}