#include"bits/stdc++.h"
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define int long long
const long long mod = 998244353;
typedef pair<int, int> P;

signed main() {
	string a, b; cin >> a >> b;
	cout << a << " xor " << b << endl;
}