func_code_string: #include <bits/stdc++.h>   using namespace std;   const int SIZE = 1e5 + 10;   int a[SIZE];   int main() {     ios::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     int T, n;     cin >> T;     while (T--) {       cin >> n;       vector<int> ans;       for (int i = 1; i <= n; i++) {         cin >> a[i];         if (a[i] % 2 == 0) ans.push_back(i);       }       if (ans.size()) {         cout << 1 << endl << ans[0] << endl;         continue;       }       if (n == 1) {         cout << -1 << endl;         continue;       }       cout << 2 << endl;       cout << 1 <<     << 2 << endl;     }     return 0;   }   