#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <fstream>
#include <sstream>
#include<set>
#include<stack>
#include<time.h>
#include <sys/types.h>
#include <tuple>
#include <numeric>
#include <iterator>

typedef long long int ll;
//#include<bits/stdc++.h>


using namespace std;





int main()
{

    int Q;
    Q = 1;
    cin >> Q;


    while (Q--) {
        int n;
        cin >> n;
        int m;
        cin >> m;

        if (n >= m) {
            cout << (n + 3) / 4 << endl;
        }
        else {
            
            int t = n / 4;
            m -= t * 4;
            m += n % 4;
            t += (m + 7) / 8;

            cout << t<< endl;
        }

    }
    return 0;
}