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<html><head><style>#demo {color: blue;}.test {color: green;} p {color: red;} </style></head><body><p id="demo" class="test">Hello World!</p></body></html><html><head><style>#demo {color: blue;}.test {color: green;} p {color: red;} </style></head><body><p id="demo" class="test">Hello World!</p></body></html>