func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long mod = 1e9 + 7;   const double PI = acos(-1);   long long power(long long x, long long y) {     if (y == 0)       return 1;     else if (y == 1)       return x;     long long r = power(x, y / 2);     if (y % 2 == 0)       return (r * r);     else       return (r * r * x);   }   bool primechecker(long long i) {     bool valid = true;     for (int j = 2; j <= sqrt(i); j++) {       if (i % j == 0) {         valid = false;         break;       }     }     if (valid && i != 1)       return true;     else       return false;   }   vector<bool> prime(10000001, true);   void sieveprime() {     prime[0] = false;     prime[1] = false;     for (int i = 2; i < prime.size(); i++) {       if (prime[i] == true) {         for (int j = i + i; j <= 10000000; j += i) prime[j] = false;       }     }     return;   }   int main() {     int t;     cin >> t;     while (t--) {       long long a, b;       cin >> a >> b;       cout << (a ^ b) <<   n ;     }     return 0;   }   