span> <a href="index.html" data-rel="index.html">Welcome</a>
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            <ul>
                <li>
                    <span>0.1</span> <a href="javascript:void(0)" data-rel="devops-quick-demo.html">Quick Demo</a>
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                <li>
                    <span>1.0</span> <a href="javascript:void(0)" data-rel="devops-intro.html">Course Introduction</a>
                </li>
                <li>
                    <span>1.1</span> <a hr