#include <bits/stdc++.h>
using namespace std;
#define IO ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
const long long N = 2e5 + 5, MOD = 1e9 + 7, OO = 1e18;
const double PI = acos(-1);
const int dx[4] = {0, 0, 1, -1};
const int dy[4] = {1, -1, 0, 0};

long long t, n, k, a[N];

int main() {
    IO
    cin >> t;
    while (t--) {
        cin >> n >> k;
        for (int i = 1; i <= n; i++)cin >> a[i];
        deque<long long>dq;
        map<long long, long long, greater<long long>>mp;
        for (int i = 1; i < k; i++) {
            dq.push_back(a[i]);
            mp[a[i]]++;
        }
        dq.push_front(0LL);
        mp[0LL]++;
        for (int i = k; i <= n; i++) {
            mp[dq.front()]--;
            if (mp[dq.front()] == 0)mp.erase(dq.front());
            dq.pop_front();
            dq.push_back(a[i]);
            mp[a[i]]++;
            cout << mp.begin()->first << ' ';
        }
        cout << '\n';
    }
    return 0;
}