Write a program to implement Lists in HTML

Write a program to implement Lists in HTML

<ul>
    <li>Input Devices
        <ul>
            <li>Keyboard</li>
            <li>Mouse</li>
            <li>Scanner</li>
        </ul>
    </li>
    <li>Output Devices
        <ul>
            <li>Monitor</li>
            <li>Printer</li>
            <li>Speaker</li>
        </ul>
    </li>
    <li>Storage Devices
        <ul>
            <li>Primary Storage
                <ul>
                    <li>RAM</li>
                    <li>ROM</li>
                </ul>
            </li>
            <li>Secondary Storage
                <ul>
                    <li>Hard Disk</li>
                    <li>Pen Drive</li>
                    <li>CD/DVD</li>
                </ul>
            </li>
        </ul>
    </li>
</ul>