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<!DOCTYPE html>
<html>
<body>
<h2>The feOffset and feBlend Filters</h2>
<svg height="150" width="150" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <filter id="f1" width="120" height="120">
      <feOffset in="SourceGraphic" dx="20" dy="20" />
      <feBlend in="SourceGraphic" in2="offOut" />
    </filter>
  </defs>
  <rect width="90" height="90" stroke="green" stroke-width="3" fill="yellow" filter="url(#f1)" />
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</svg>
</body>
</html>