#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>

FILE* fin;

int tri [256][256];
int size;


#define mmin(a,b)  (((a) < (b) ) ? (a) : (b))

int main (void)
{
   fin = fopen ("triangle.in", "rt");
   
   for ( int probn = 1;  ;  ++probn )
   {
      fscanf (fin, "%d\n", &size);
      if ( size == 0 )  break;
      
      char buff [256];
      memset (&tri, 0, sizeof (tri));
      int max = 0;
      for ( int i = 0;  i < size;  ++i )
      {
         fgets (buff, 256, fin);
         for ( int j = 0;  j < (size-i)*2 - 1;  ++j )
         {
            tri[i][i+j] = (( buff[i+j] == '-' ) ? 1 : 0 );
            if ( buff[i+j] == '-' )  max = 1;
         }
      }

      for ( int row = 1;  row < size;  ++row )
         for ( int col = row;  col < size*2-row-1;  col += 2 )
            if ( tri[row][col] > 0 && tri[row-1][col] > 0 )
            {
               int p = tri[row][col] =
                     mmin (tri[row-1][col-1], tri[row-1][col+1])+1;
               if ( p > max )  max = p;
            }
      
      for ( int row = size-2;  row >= 0;  --row )
         for ( int col = row+1;  col < size*2-row-1;  col += 2 )
            if ( tri[row][col] > 0 && tri[row+1][col] > 0 )
            {
               int p = tri[row][col] =
                     mmin (tri[row+1][col-1], tri[row+1][col+1])+1;
               if ( p > max )  max = p;
            }
      
      printf ("Triangle #%d\nThe largest triangle area is %d.\n\n",
            probn, max*max);
   }

   fclose (fin);
   return 0;
}