/* SWERC'97 - Triangle      */
/* 11/11/97 - Matthias Ruhl */

#include <stdio.h>

#define MAXLINES 100
#define min(a,b) ((a)<(b)?(a):(b))

FILE *inp;
int n;
char t[MAXLINES][2*MAXLINES];

int largest()
{
  int i,j,h[2*MAXLINES],best;

  best = 0;
  /* down facing */
  for(i=0;i<2*n-1;i+=2)
    if(t[0][i] == '-') h[i] = best = 1; else h[i] = 0;
  for(i=1;i<n;i++)
    for(j=0;j<2*(n-i)-1;j+=2)
      if(t[i][j] == '-')
	{
	  if(t[i-1][j+1] == '-')
	    h[j] = 1+min(h[j],h[j+2]);
	  else
	    h[j] = 1;
	  if(h[j] > best) best = h[j];
	}
      else h[j] = 0;
  /* up facing */
  for(i=n-2;i>=0;i--)
    {
      for(j=2*(n-i)-3;j>=1;j-=2)
	if(t[i][j] == '-')
	  {
	    if(t[i+1][j-1] == '-' && j > 1 && j < (2*(n-i)-3))
	      h[j] = 1+min(h[j-2],h[j]);
	    else
	      h[j] = 1;
	    if(h[j] > best) best = h[j];
	  }
	else h[j] = 0;
    }
  return best*best;
}

int main()
{
  int i,caseno = 1;

  inp = fopen("triangle.in","r");
  while(fscanf(inp,"%d",&n) && n != 0)
    {
      for(i=0;i<n;i++) fscanf(inp,"%s",t[i]);
      printf("Triangle #%d\n",caseno++);
      printf("The largest triangle area is %d.\n\n",largest());
    }
  fclose(inp);
  return 0;
}