#include<bits/stdc++.h>
#include<atcoder/all>
#define chmin(x,y) (x) = min((x),(y))
#define chmax(x,y) (x) = max((x),(y))z
using namespace std;
using namespace atcoder;
using ll = long long;
const ll mod = 998244353;
using mint = modint998244353;
using Graph = vector<vector<pair<int,ll>>>;
const vector<int> dx = {1,0,-1,0}, dy = {0,1,0,-1};

double dist(int x1, int y1, int x2, int y2){
  double res = (x1-x2) * (x1-x2) + (y1-y2) * (y1-y2);
  return sqrt(res);
}

ll need(ll n, ll m){
  ll res = 0;
  if(n < 0) return res;
  res = n / m;
  if(n % m > 0) res++;
  return res;
}

int main(){
  // input
  int T;
  cin >> T;
  while(T--){
    int N,M;
    cin >> N >> M;
    
    int edge = need(N,4), rem = edge * 4 - N;
    
    M -= rem;
    
    int ans = edge + need(max(M - 4*edge, 0), 8);
    cout << ans << endl;
  }
}