#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(NULL);cin.tie(NULL);cout.tie(NULL);
#define fi first
#define se second
#define pb push_back
#define endl "\n"
//~ #define int long long
using namespace std;
typedef long long ll;
typedef pair<int, int> ii;
int n, k;
int a[500005];
vector<int> ans, bg, v;
int32_t main(){
cin>>n>>k;
for(int i=1;i<=n;i++){
cin>>a[i];
}
sort(a+1, a+n+1);
int t = 0;
for(int i=1;i<=n;i++){
if(a[i] > k){
t++;
bg.pb(i);
}
}
if(t > k){
cout<<-1<<endl;
return 0;
}
int cur = 0, ind = n+5;
for(int i=1;i<=n;i++){
if(cur+t == k || a[i] > k){
ind = i;
break;
}
if(cur>=a[i]){
v.pb(i);
continue;
}
ans.pb(i);
cur++;
}
if(cur+t < k){
cout<<-1<<endl;
return 0;
}
for(int i=ind;i<=n;i++){
if(a[i] > k)break;
v.pb(i);
}
reverse(ans.begin(), ans.end());
for(auto it: v)cout<<a[it]<<" ";
for(auto it: bg)cout<<a[it]<<" ";
for(auto it: ans)cout<<a[it]<<" ";
cout<<endl;
}
