#include <iostream>   #include <map>   #include <set>   #include <queue>   #include <stack>   #include <algorithm>   #include <vector>   #include <string>   #include <iomanip>   #include <cmath>   #include <cstdio>   #include <cstring>   #include <climits>   #define Buff std::ios::sync_with_stdio(false), cin.tie(0), cout.tie(0)   #define ll long long   #define inf LONG_LONG_MAX   #define Inf INT_MAX   #define endl   n       using namespace std;      const int Maxn = 1e3 + 10;   const ll Mod = 1e9 + 7;      int t, n;   char bd[Maxn][Maxn];   bool firPos1;   int posX1, posX2, posX3, posX4;   int posY1, posY2, posY3, posY4;   int dis;      void work()   {       firPos1 = false;       cin >> n;       for (int i = 1; i <= n; i++)       for (int j = 1; j <= n; j++)       {           cin >> bd[i][j];           if (bd[i][j] ==  * )           {               if (firPos1 == false)               {                   posX1 = i;                   posY1 = j;                   firPos1 = true;               }else               {                   posX2 = i;                   posY2 = j;               }           }       }       if (posX2 == posX1)       {           dis = 1;           if (posX1 - dis >= 1)           {               posX3 = posX1 - dis;               posX4 = posX1 - dis;               posY3 = posY1;               posY4 = posY2;           }else           {               posX3 = posX1 + dis;               posX4 = posX1 + dis;               posY3 = posY1;               posY4 = posY2;           }       }else       if (posY2 == posY1)       {           dis = 1;           if (posY1 - dis >= 1)           {               posY3 = posY1 - dis;               posY4 = posY1 - dis;               posX3 = posX1;               posX4 = posX2;           }else           {               posY3 = posY1 + dis;               posY4 = posY1 + dis;               posX3 = posX1;               posX4 = posX2;           }       }else       {           int minx = min(posX1,posX2);           int maxx = max(posX1,posX2);           int miny = min(posY1,posY2);           int maxy = max(posY1,posY2);           posX1 = minx;           posY1 = miny;           posX2 = minx;           posY2 = maxy;           posX3 = maxx;           posY3 = miny;           posX4 = maxx;           posY4 = maxy;       }       bd[posX1][posY1] =  * ;       bd[posX2][posY2] =  * ;       bd[posX3][posY3] =  * ;       bd[posX4][posY4] =  * ;       for (int i = 1; i <= n; i++)       {           for (int j = 1; j <= n; j++)               cout << bd[i][j];           cout << endl;       }   }      int main()   {       Buff;       cin >> t;       while (t--)           work();       return 0;   }