#include <iostream>
using namespace std;
typedef long long ll;
ll satisfaction(ll a, ll b, ll c){
	ll ret;
	if(a>c)
		ret = 2*(c+b/2);
	else
		ret = 2*(a+b/2)+(c-a)/2;
	return ret;
}
int main() {
	int t;cin>>t;
	while(t--){
		ll a,b,c;cin>>a>>b>>c;
		cout << satisfaction(a,b,c)<<endl;
	}
}