#include <bits/stdc++.h>
using namespace std;
#define ms(s,n) memset(s,n,sizeof(s))
#define all(a) a.begin(),a.end()
#define present(t, x) (t.find(x) != t.end())
#define sz(a) int((a).size())
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define FORd(i, a, b) for (int i = (a) - 1; i >= (b); --i)
#define pb push_back
#define pf push_front
#define fi first
#define se second
#define mp make_pair
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> pi;
typedef vector<int> vi;
typedef vector<pi> vii;
const int MOD = (int) 1e9+7;
const int INF = (int) 1e9+1;
inline ll gcd(ll a,ll b){ll r;while(b){r=a%b;a=b;b=r;}return a;}
inline ll lcm(ll a,ll b){return a/gcd(a,b)*b;}
int main(){
#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
int t; cin >> t;
while(t--){
int n; cin >> n;
int a[n];
for(int &x : a) cin >> x;
int min1 = 1e9, min2 = 1e9;
for(int i = 0; i < n; i++){
if(a[i] < min1){
min2 = min1;
min1 = a[i];
}
else if(a[i] < min2 && a[i] != min1){
min2 = a[i];
}
}
if(min2 == 1e9){
cout << "-1\n";
}
else{
cout << min1 << " " << min2 << endl;
}
}
return 0;
}
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