form-control" placeholder="Input group example" aria-label="Input group example" aria-describedby="btnGroupAddon">
  </div>
</div>
<div class="btn-toolbar justify-content-between" role="toolbar" aria-label="Toolbar with button groups">
  <div class="btn-group" role="group" aria-label="First group">
    <button type="button" class="btn btn-primary">1</button>
     ...
  </div>
  <div class="input-group">
    <div class="input-group-text" id="btnGroupAddon2">@</div>
    <input type="text" class="form-control"