<input type="text" list="planets">
<datalist id="planets">
    <option value="Mercury"></option>
    <option value="Venus"></option>
    <option value="Earth"></option>
    <option value="Mars"></option>
    <option value="Jupiter"></option>
    <option value="Saturn"></option>
    <option value="Uranus"></option>
    <option value="Neptune"></option>
</datalist>

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