#include <iostream>
#include <fstream>
using namespace std;
int main() {
	char c;
	for (int i = 0; i < 2; i++){
		for (int j = 0; j < 256; j++){
			c = c & 0;
			c = c | j;
			cout << (char)c;
		}
	}
	return 0;
}