#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fr first
#define sc second
#define pb push_back
#define all(x) x.begin(),x.end()
#define sp << " " <<
#define inf 1e15
#define N 200000
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef tuple<int,int,int> tiii;
typedef pair<int,int> pii;
void solve(){
int n,k;
cin >> n >> k;
int a[n];
for(int i=0;i<n;i++)
cin >> a[i];
sort(a,a+n);
vector<int> t,f;
for(int i=0;i<n;i++){
if(f.size()<a[i] || a[i]>k) f.pb(a[i]);
else t.pb(a[i]);
}
int sz=f.size();
if(sz<k || (sz>k && f[sz-k-1]>k)){
cout << -1 << endl;
return;
}
vector<int> ans;
for(int i=0;i<sz;i++)
ans.pb(f[(sz-k+i)%sz]);
for(auto i:t) ans.pb(i);
for(auto i:ans)
cout << i << " ";
cout << endl;
}
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);cout.tie(NULL);
int test=1;
//~ cin >> test;
while(test--) solve();
}
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