""#                               
 mmmm     #    m   m  mmmmm   mmm "   mmm  
 #" "#    #    #   #  # # #  #"  #   #   " 
 #   #    #    #   #  # # #  #""""    """m 
 ##m#"    "mm  "mm"#  # # #  "#mm"   "mmm" 
 #                                        
     
      h i d d e n   d i m e n s i o n