<!DOCTYPE html>
<html>
<body>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<defs>
<filter id="test" filterUnits="objectBoundingBox" x="0" y="0" width="1.5" height="4">
<feOffset result="Off1" dx="15" dy="20" />
<feFlood style="flood-color:#ff0000;flood-opacity:0.8" />
<feComposite in2="Off1" operator="in" result="C1" />
<feOffset in="SourceGraphic" result="Off2" dx="30" dy="40" />
<feFlood style="flood-color:#ff0000;flood-opacity:0.4" />
<feComposite in2="Off2" operator="in" result="C2" />
<feMerge>
<feMergeNode in="C2" />
<feMergeNode in="C1" />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
</defs>
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