#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    int t;
    cin >> t;
    while(t--) {
        int n, m;
        cin >> n >> m;
        int T = (n+3)/4;
        n %= 4;
        ll res = T * 4;
        if(n) m -= 4-n;
        m -= res;
        dbg(n,res,m);
        if(m>=0) T += (m+7)/8;
        cout << T << endl;
    }
    return 0;
}