Cambios

     $(this).append(' <span class="dynamicFontLineWordsNumber"> '+(wordsLength)+'</span>');

     $(this).append(' <span class="dynamicFontLineWordsNumber"> '+(wordsLength)+'</span>');

});

});

$( "button" ).click(function() {

$( "button" ).click(function() {

   $( ".dynamicFontLineWordsNumber" ).hide( "slow" );

   $( "span.dynamicFontLineWordsNumber" ).hide( "slow" );

});

});

</script>

</script>

<style>

<style>