func_code_string: #include <bits/stdc++.h>   using namespace std;   long long power(long long a, long long b) {     long long prod = 1;     while (b) {       if (b & 1) prod = (prod * a);       a = (a * a);       b >>= 1;     }     return prod;   }   int main() {     int t;     cin >> t;     while (t--) {       int n;       cin >> n;       vector<int> odd, even;       for (int i = 0; i < n; i++) {         int x;         cin >> x;         if (x % 2 == 1) {           odd.push_back(i + 1);         } else           even.push_back(i + 1);       }       if (even.size() > 0)         cout << 1 << endl << even[0] << endl;       else {         if (odd.size() >= 2) {           cout << 2 << endl << odd[0] <<     << odd[1] << endl;         } else {           cout << -1 << endl;         }       }     }     return 0;   }   