#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <float.h>
#include <limits.h>

#define ABS(X) ((X<0)?(-X):(X))
#define SQR(X) ((X)*(X))
#define MIN(a,b) (((a)<(b))?(a):(b))


#define INFILE "triangle.in"

FILE *fin;
int caseno=0;

int *tri[100];
char s[200];
int width,height;

int minimum (int a,int b,int c){
  int tmp1=MIN(a,b);
  int tmp2=MIN(tmp1,c);
  return tmp2;
}

int solvecase(){
  while(1){
    //fscanf(fin,"%d",&height);
    fgets(s,300,fin);
    sscanf(s,"%d",&height);
    //printf("%d\n",height);
    if(height==0)
      return 0;
    else{
      caseno++;
      int maxi=0;
      width=2*height-1;

      //read input and compute upside down
      for(int i=0; i<height; i++){
	fgets(s,300,fin);
	//printf("%s",s);
	if(i==0){
	  for(int j=0; j<width; j++){
	    if(s[j]=='#'){
	      tri[i][j]=0;
	    } else{ //=='-'
	      tri[i][j]=1;
	      if(tri[i][j]>maxi){
		maxi=tri[i][j];
	      }
	      //maxi=1;
	    }

	    //  printf("%d",tri[i][j]);
	  }
	} else{
	  for(int j=i; j<width-i; j++){
	    if(s[j]=='#'){
	      tri[i][j]=0;
	    } else{
	      int tmp=minimum(tri[i-1][j-1],tri[i-1][j], tri[i-1][j+1]);
	      tri[i][j]=tmp+1;
	      if(tri[i][j]>maxi){
		maxi=tri[i][j];
	      }
	    }
	    // printf("%d",tri[i][j]);
	  }
	} //else
	//printf("\n");
      }

      //printf("max bis jetzt=%d\n",maxi);

      //read input and compute bottom up
	for(int i=height-1; i>=0; i--){
	  if(i==height-1){
	    if(tri[i][width-i-1]>0){
	      tri[i][width-i-1]=1;
	      if(tri[i][width-i-1]>maxi){
		maxi=tri[i][width-i-1];
	      }

	    }
	    //    printf("%d",tri[i][width-i-1]);
	  } else{
	    for(int j=i; j<width-i; j++){
	      if((j<i+2)||(j>width-i-3)){
		if(tri[i][j]>0){
		  tri[i][j]=1;
	          if(tri[i][j]>maxi){
	    	    maxi=tri[i][j];
	          }
		 
		}
	      } else{
		if(tri[i][j]>0){
	  	  int tmp=minimum(tri[i+1][j-1],tri[i+1][j], tri[i+1][j+1]);
  	          tri[i][j]=tmp+1;
	          if(tri[i][j]>maxi){
	  	    maxi=tri[i][j];
	          }
		}
	      }
	      // printf("%d",tri[i][j]);
	    }
	  }
	  //printf("\n");
	}
	
      fgets(s,300,fin);
      printf("Triangle #%d\n",caseno);
      printf("The largest triangle area is %d.\n\n", (maxi*maxi));
    }//else
  }
     
		


}

//int readcase(){

//}

int main(){

  for(int i=0; i<100; i++){
    tri[i]=new int[199];
  }


 fin=fopen(INFILE,"r");


   solvecase();


 fclose(fin);
 return 0;
}