#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define pii pair<ll, ll>
#define fi first
#define sec second
#define ld long double
const int MAXN = 5e5;
const ll INF = 1e18;
const int MOD = 1e9 + 7;
const ld eps = 1e-6;
ll a[MAXN + 5];
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);		
	int tc = 1;	
	// cin >> tc;
	for(;tc--;){
		ll N, K; cin >> N >> K;
		for(int i = 1; i <= N; i++) cin >> a[i];
		sort(a + 1, a + 1 + N);
		
		set<ll> good;
		vector<ll> bad;
		for(int i = 1; i <= N - K; i++){
			good.insert(a[i]);
		}
		
		ll cur = 0;
		bool ok = 1;
		for(int i = N - K + 1; i <= N; i++){
			if(a[i] <= cur){
				auto it = good.lower_bound(cur + 1);
				if(it != good.end()){
					good.erase(it);
					bad.push_back((*it));
					good.insert(a[i]);
				}
				else{
					ok = 0;
					break;
				}
			}
			else bad.push_back(a[i]);
			cur++;
		}
		
		if(!ok) cout << "-1\n";
		else{
			for(auto x : bad) cout << x << " ";
			for(auto x : good) cout << x << " ";
			cout << "\n";
		}
	}
}
/*
*/
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