rompecabezas con simbolos de compuertas logicas

<span title="Índice - online jigsaw puzzle - 36 pieces" style="display:inline-block;margin:.6em;width:128px"><a href="http://www.jigsawplanet.com/?rc=play&amp;pid=2c6bad6a0c79" style="display:block;text-decoration:none;position:relative;width:121px;margin:0 auto .4em auto"><img alt="preview" style="display:block;border:1px #000 solid;box-shadow:2px 2px 5px rgba(0,0,0,.2)" src="http://im.jigsawplanet.com/?rc=img&amp;pid=2c6bad6a0c79&amp;size=128"><span style="position:absolute;right:5px;bottom:4px"><span style="font:bold 16px Verdana,sans-serif;color:#fff;text-shadow:1px 1px 2px #000;vertical-align:middle">36 </span><img style="border:0;vertical-align:middle" src="http://www.jigsawplanet.com/img/preview/piece-rot.png" alt="piece"></span></a><a style="display:block;text-align:center;overflow:hidden" href="http://www.jigsawplanet.com/?rc=play&amp;pid=2c6bad6a0c79">Índice</a></span>