//  Concert Tickets

#include<bits/stdc++.h>

using namespace std;
using ll = long long;

int main() {
    int n, m; cin >> n >> m;
    multiset<ll> price;
    for (int i{}; i < n; i++) {ll a; cin >> a; price.insert(a);}
    for (int i{}; i < m; i++) {
        ll v; cin >> v;
        auto it = price.upper_bound(v);
        if (it == price.begin()) {
            cout << -1 << endl;
        } else {
            cout << *(--it) << endl;
            price.erase(it);
        }
    }
    return 0;
}