I want in the following code, to move the element .buscarusuarios within the first TD son of the TR classe fltrow, once the sun starts. I'm a little lost with the CSS3 selectors
<form class="buscarusuarios">
<input class="form-control mr-sm-2" id="myInput" onkeyup="myFunction()"
type="search" placeholder="Search" aria-label="Search">
</form>
<tr class="fltrow">
<td>Prueba</td>
<td>Prueba</td>
<td>Prueba</td>
<td>Prueba</td>
<td>Prueba</td>
</tr>