#include <iostream>
#include <string>
#include <algorithm>
#include <math.h>
#include <vector>
#include <set>
#include <cstring>

using namespace std;
typedef long long LL;
static const double EPS = 1e-9;

#define FOR(i,k,n) for (int i=(k); i<(int)(n); ++i)
#define REP(i,n) FOR(i,0,n) 
int nx,ny,nr;
int dx[4] = {1,0,-1,0};
int dy[4] = {0,1,0,-1};
int a[100][100];
bool plot(int x, int y, int r, int n){
  int count = 0;
  bool flag = true;
  if((x+2*dx[r]>=0&&x+2*dx[r]<n)&&
      y+2*dy[r]>=0&&y+2*dy[r]<n&&a[x+2*dx[r]][y+2*dy[r]]==1)
    return false;
  x+=dx[r]; y+=dy[r];
  while((x>=0&&x<n)&&(y>=0&&y<n)){
    if((x+2*dx[r]>=0&&x+2*dx[r]<n)&&y+2*dy[r]>=0&&y+2*dy[r]<n&&a[x+2*dx[r]][y+2*dy[r]]==1) flag = false;
    a[x][y] = 1;
    x+=dx[r]; y+=dy[r];
    count++;
    if(!flag) break;
  }
  x-=dx[r];y-=dy[r]; nx=x; ny=y; nr=(r+1)%4;
  if(count<2) return false;
  return true;
}
int main(void){
  int d;
  cin>>d;
  while(d--){
    int n;
    cin>>n;
    memset(a,0,sizeof(a));
    a[0][n-1]=1;
    nx=0; ny=n-1; nr=3;
    while(plot(nx,ny,nr,n));
    if(n==2) a[1][0]=1;
    REP(i,n){
      REP(j,n)
        printf("%c",(a[j][i]==1)?'#':' ');
      cout << endl;
    }
    if(d)cout << endl;
  }
  return 0;
}