#include <bits/stdc++.h>
#include <iostream>
#include <cstdio>
#define endl '\n'
using namespace std;
int main()
{
    int t; cin >> t;
    while(t--)
    {
        int n,cnt=0;cin >> n;
        int x1,y1,x2,y2,x3,y3,x4,y4;
        for(int i=1; i<=n; i++)
        {
            string s; cin >> s;
            for(int j=0; j<n; j++)
            {
                if(s[j]=='*')
                {
                    if(cnt==0)x1=i,y1=j+1;
                    else if(cnt==1)x2=i,y2=j+1;
                    cnt++;
                }
            }
            //if(cnt==2)break;
        }
        if(x1==x2)
        {
            if(x1==1)x3=x4=x1+1;
            else if(x1==n)x3=x4=x1-1;
            else x3=x4=x1+1;
            y3=y1,y4=y2;
        }
        if(y1==y2)
        {
            if(y1==1)y3=y4=(y1+1);
            else if(y1==n)y3=y4=(y1-1);
            else y3=y4=(y1+1);
            x3=x1,x4=x2;
        }
        if(x1!=x2 && y1!=y2){
            x3=x1,y3=y2,x4=x2,y4=y1;
        }
        for(int i=1; i<=n; i++){
            for(int j=1; j<=n; j++){
                if(i==x1 && j==y1)cout << "*";
                else if(i==x2 && j==y2)cout << "*";
                else if(i==x3 && j==y3)cout << "*";
                else if(i==x4 && j==y4)cout << "*";
                else cout << ".";
            }
            cout << endl;
        }
    }
    return 0;
}
/***
6
4
..*.
....
*...
....
2
*.
.*
2
.*
.*
3
*.*
...
...
5
.....
..*..
.....
.*...
.....
4
....
....
*...
*...

*/
