using System;
using System.Collections;
using System.IO;
using System.Linq;
using System.Text;
class Nice {
	static string[] symbols = new String[] { " ", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "+", "-", "/", "*", "=", "^", "%", ".", ",", ":" };
	static string changeWord(string str) {
		bool[] buk = new bool[28];
		string res = "";
		for (int i = 0; i < str.Length; i++) {
			int ch = Char.ToLower(str[i]) - 'a';
			if (!buk[ch]) {
				res += str[i];
				buk[Char.ToLower(str[i]) - 'a'] = true;
			}
		}
		return res;
	}
	static Encoding encoding = Encoding.ASCII;
	static byte[] crypt(string text, string keying) {
		byte[] plainText = encoding.GetBytes(text);
		byte[] key = encoding.GetBytes(keying);


		// encrypt: key XOR plainText

		byte[] cipherText = new byte[plainText.Length];
		new BitArray(key).Xor(new BitArray(plainText)).CopyTo(cipherText, 0);


		// decrypt: key XOR chipherText

		//byte[] decripted = new byte[cipherText.Length];
		//new BitArray(key).Xor(new BitArray(cipherText)).CopyTo(decripted, 0);

		return /*encoding.GetString(*/cipherText/*)*/;
	}
	static byte[] cryptBytes(byte[] plainText, byte[] key) {
		// encrypt: key XOR plainText

		byte[] cipherText = new byte[plainText.Length];
		new BitArray(key).Xor(new BitArray(plainText)).CopyTo(cipherText, 0);


		// decrypt: key XOR chipherText

		//byte[] decripted = new byte[cipherText.Length];
		//new BitArray(key).Xor(new BitArray(cipherText)).CopyTo(decripted, 0);

		return /*encoding.GetString(*/cipherText/*)*/;
	}
	static byte[] bt(byte b) {
		return new Byte[] { b };
	}
	public static string HextoString(string InputText) {

		byte[] bb = Enumerable.Range(0, InputText.Length)
						 .Where(x => x % 2 == 0)
						 .Select(x => Convert.ToByte(InputText.Substring(x, 2), 16))
						 .ToArray();
		return System.Text.Encoding.ASCII.GetString(bb);
		// or System.Text.Encoding.UTF7.GetString
		// or System.Text.Encoding.UTF8.GetString
		// or System.Text.Encoding.Unicode.GetString
		// or etc.
	}
	public static byte[] HextoBytes(string InputText) {

		byte[] bb = Enumerable.Range(0, InputText.Length)
						 .Where(x => x % 2 == 0)
						 .Select(x => Convert.ToByte(InputText.Substring(x, 2), 16))
						 .ToArray();
		return bb;
	}
	static string twoSybm(string str) {
		return (str.Length == 1 ? "0" + str : str);
	}
	static string ToHexString(byte[] hexstring) {
		StringBuilder sb = new StringBuilder();
		foreach (char t in hexstring) {
			//Note: X for upper, x for lower case letters
			sb.Append(Convert.ToInt32(t).ToString("x"));
		}
		return twoSybm(sb.ToString());
	}
	static string printHex(string hex) {
		string res = "";
		for (int i = 0; i < hex.Length; i++) {
			if (i != 0 && i % 2 == 0)
				res += " ";
			res += hex[i];
		}
		return res;
	}
	static void Main(string[] args) {

		/*byte[] text = HextoBytes("315c4eeaa8b5f8aaf9174145bf43e1784b8fa00dc71d885a804e5ee9fa40b16349c146fb778cdf2d3aff021dfff5b403b510d0d0455468aeb98622b137dae857553ccd8883a7bc37520e06e515d22c954eba5025b8cc57ee59418ce7dc6bc41556bdb36bbca3e8774301fbcaa3b83b22");
		byte[] keying = HextoBytes("234c02ecbbfbafa3ed18510abd11fa724fcda2018a1a8342cf064bbde548b12b07df44ba7191d9606ef4081ffde5ad46a5069d9f7f543bedb9c861bf29c7e205132eda9382b0bc2c5c4b45f919cf3a9f1cb74151f6d551f4480c82b2cb24cc5b028aa76eb7b4ab24171ab3cdadb8356f");
		byte[] crypted = cryptBytes(text, keying);
		*/
		//byte[] text = encoding.GetBytes("abcdefghijklmnopqrstuvwxyz"); //with spaces 65-90 for a-z
		byte[] text = encoding.GetBytes("ABCDEFGHIJKLMNOPQRSTUVWXYZ"); //with spaces 97-122 for A-Z
		byte[] keying = encoding.GetBytes("..........................");
		byte[] crypted = cryptBytes(text, keying);

		byte[] text1 = HextoBytes("315c4eeaa8b5f8aaf9174145bf43e1784b8fa00dc71d885a804e5ee9fa40b16349c146fb778cdf2d3aff021dfff5b403b510d0d0455468aeb98622b137dae857553ccd8883a7bc37520e06e515d22c954eba5025b8cc57ee59418ce7dc6bc4");
		byte[] keying1 = HextoBytes("32510ba9a7b2bba9b8005d43a304b5714cc0bb0c8a34884dd91304b8ad40b62b07df44ba6e9d8a2368e51d04e0e7b207b70b9b8261112bacb6c866a232dfe257527dc29398f5f3251a0d47e503c66e935de81230b59b7afb5f41afa8d661cb");
		//byte[] text = HextoBytes("271946f9"); //HextoBytes("32510b");
		//byte[] keying = new Byte[] { 102, 57, 110};//102 57 110  The
		//Разница между заглавными буквами = 32 = 2^8
		byte[] crypted1 = cryptBytes(text1, keying1);
		for (int i = 0; i < Math.Min(text.Length, text1.Length); i++) {
			Console.WriteLine("{0}({1}) xor {2}({3}) = {4}({5})  :  {6}({7})", (int)text[i], encoding.GetString(bt(text[i])), (int)keying[i], encoding.GetString(bt(keying[i])), (int)crypted[i], ToHexString(bt(crypted[i])), (int)crypted1[i], ToHexString(bt(crypted1[i])));
		}
		Console.WriteLine("\n Result: \n {0} \n  =to=  \n {1}", text, encoding.GetString(crypted));


		Console.WriteLine("\n comparing: \n {0} \n  =with=  \n {1}", printHex(ToHexString(crypted)), printHex(ToHexString(crypted1)));

		//диапазон 0-31
		//заглавная буква +32 к разнице
		//То есть числа > 31 - заглавные буквы
		//Пробел - диапазон от 65-90 (ш16-я с. с. 41-5a)
		//Точка 1-93 с заглавными
		//Точка 0-93 с заглавными
		int max = 0;
		char[] maxi = new char[] { 'A', 'A' };
		int min = int.MaxValue;
		char[] mini = new char[] { 'A', 'A' };
		for (byte i = 0; i < 26; i++) {
			for (byte j = 0; j < 26; j++) {
				char ct = (char)('A' + i);
				char ct2 = (char)('a' + j);
				byte[] cry = crypt(Char.ToString(ct), Char.ToString(ct2));
				if (cry[0] >= max) {
					max = cry[0];
					maxi = new char[] { ct, ct2 };
				}
				if (cry[0] <= min) {
					min = cry[0];
					mini = new char[] { ct, ct2 };
				}
			}
		}
		Console.WriteLine("MAX: " + max + " = " + maxi[0] + " xor " + maxi[1]);
		Console.WriteLine("MIN: " + min + " = " + mini[0] + " xor " + mini[1]);

		//Console.WriteLine(HextoString("32510ba9babebbbefd001547a810e67149caee11d945cd7fc81a05e9f85aac650e9052ba6a8cd8257bf14d13e6f0a803b54fde9e77472dbff89d71b57bddef121336cb85ccb8f3315f4b52e301d16e9f52f904") + " - eto");
		Console.ReadKey();
	}
}
/*
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

class Nice {

	static string[] symbols = new String[] { " ", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "+", "-", "/", "*", "=", "^", "%", ".", ",", ":" };

	static string changeWord(string str) {
		bool[] buk = new bool[28];
		string res = "";
		for (int i = 0; i < str.Length; i++) {
			int ch = Char.ToLower(str[i]) - 'a';
			if (!buk[ch]) {
				res += str[i];
				buk[Char.ToLower(str[i]) - 'a'] = true;
			}
		}
		return res;
	}

	static void Main(string[] args) {
		string[] lines = File.ReadAllLines("input.txt");
		string[] lastline = Array.ConvertAll((lines[lines.Length - 1]).Split(symbols, StringSplitOptions.RemoveEmptyEntries), changeWord);
		foreach (string line in lines) {
			string[] words = Array.ConvertAll(line.Split(symbols, StringSplitOptions.RemoveEmptyEntries), changeWord);
			foreach (string str in words)
				if (str != lastline[lastline.Length - 1])
					Console.Write(str + " ");
		}
		Console.ReadKey();
	}
}*/