#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define FOR(I,A,B) for(ll I = ll(A); I < ll(B); ++I)
const ll MOD = 1000000007;
int main(){
  string a,b;
  cin >> a >> b;
  cout << a << " xor " << b << endl;
}