#include<bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ll long long
#define all(a) a.begin(),a.end()
#define endl '\n'
#define int ll

using namespace std;

const int N = 3e5 + 3;

int n, k;
int a[N];
set<pair<int, int> > st;


void solve() {
    cin >> n >> k;
    st.clear();
    for(int i = 1; i <= n; ++i) {
        cin >> a[i];
        st.insert(mp(a[i], i));
    }

    int ans = 0;

    while(st.size() > 0) {
        st.erase(st.find(*st.rbegin()));
        ans++;
        auto it = st.lower_bound(mp(k, 0));
        if(it != st.begin()) {
            it--;
            int x = it->ff;
            st.erase(it);
            auto it1 = st.lower_bound(mp(k - x, 0));
            if(it1 != st.begin()) {
                it1--;
                st.erase(it1);
            }
        }

    }

    cout << ans - 1 << endl;
}

main() {
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int t;
    cin >> t;
    while(t--) {
        solve();
    }
}

/*
1
3 10
2 6 8

1
4 4
2 3 4 4

5
8 25
4 5 18 3 17 17 18 14
7 21
20 14 1 4 20 8 4
8 1
20 5 9 4 14 12 2 20
8 37
2 13 13 11 12 19 16 18
4 38
15 3 14 7

1
7 21
20 14 1 4 20 8 4

1
8 25
4 5 18 3 17 17 18 14

5
8 25
4 5 18 3 17 17 18 14
7 21
20 14 1 4 20 8 4
8 1
20 5 9 4 14 12 2 20
8 37
2 13 13 11 12 19 16 18
4 38
15 3 14 7

1
8 1
20 5 9 4 14 12 2 20

*/