#include using namespace std; int main() { ios_base::sync_with_stdio(false); cin.tie(NULL); int tt; cin >> tt; while (tt--) { int n, y; cin >> n >> y; vector v(2 * n); int ans = 0; for (int &x : v) cin >> x; sort(v.begin(), v.end()); for (int i = 0; i < n; i++) { int x = v[i]; int z = v[i + n]; if (z - x >= y) { ans++; } } if (ans == n) { cout << "YES" << '\n'; } else { cout << "NO" << '\n'; } } }