C

#include <bits/stdc++.h>

using namespace std;

#define _test   int _TEST; cin>>_TEST; while(_TEST--)

int main()
{
    _test
    {
        int n;
        cin>>n;

        vector<int> a(n), b;
        for(auto &e: a)     cin>>e;

        map<int, int> cnt;
        int mmax = *max_element(a.begin(), a.end());

        for(auto e: a)
        {
            if(cnt[e])      b.push_back(mmax);
            else            b.push_back(e);

            cnt[e]++;
        }

        for(auto e: b)      cout<<e<<" ";
        cout<<"\n";
    }
}