#include <iostream>
#include <cstdlib>
#include <iomanip>
#include <fstream>
using namespace std;
	int main()
{
	setlocale (0, "");
    
    char *text = "abc";
	char *key = "f";
	char *et = "000";

	int tl = strlen(text);
	int kl = strlen(key);


	for (int i = 0; i < tl; i++)
	{
		for (int j = 0; j < kl; j++)
		{
et[i] = text[i] ^ key[j];
		}
	}
		cout << et;
	cin.get();
	cin.get();
	return 0;
	}