Two conjugate <a href="https://en.wikipedia.org/wiki/Dessin_d%27enfant" class="extiw" title="en:Dessin d'enfant">dessins d'enfants</a>
<a href="//commons.wikimedia.org/wiki/User:David_Eppstein" class="mw-redirect" title="User:David Eppstein">David Eppstein</a>
Self-made; redrawn from figures 2.9 and 2.10 of Lando, Sergei K. &amp; Zvonkin, Alexander K. (2004), <i>Graphs on Surfaces and Their Applications</i>, vol. 141, Encyclopaedia of Mathematical Sciences: Lower-Dimensional Topology II, Springer-Verlag.