public String toString(){//regular toString
	String str="";
	str+=fR+" "+fC+"\n";
	for (int i=0;i<_r;i++){
	    for (int j=0;j<_c;j++){
		if (maze[i][j]==null||maze[i][j].equals("  ")) 
		    str+="  ";
		else if (maze[i][j].equals("!"))
		    str+="!!";
		else if(maze[i][j].equals("E"))
		    str+="EE";
		else if (maze[i][j].equals("N"))
		    str+="NN";
		else
		    str+="[]";
				   
		//str+=maze[i][j]+" ";
	    }
	    str+="\n";
	}
	return str;
    }