vbar-nav">
            <li class="nav-item"><a class="nav-link" href="bootstrap-4-navbar.html">Default</a></li>
            <li class="nav-item active"><a class="nav-link" href="bootstrap-4-navbar-static-top.html">Static top</a></li>
            <li class="nav-item"><a class="nav-link" href="bootstrap-4-navbar-fixed-top.html">Fixed top</a></li>
            <li class="nav-item"><a class="nav-link" href="bootstrap-4-navbar-fixed-bottom.html">Fixed bottom</a></li>
            <li class="nav-item dropdown"><a c