\(\begin{aligned} & \textcolor{colorprop}{\text{second child}} \\ \textcolor{colordef}{\text{first child}} \end{aligned} \) | \(\textcolor{colorprop}{B}\) | \(\textcolor{colorprop}{G}\) |
\(\textcolor{colordef}{B}\) | \(\textcolor{colordef}{B}\textcolor{colorprop}{B}\) | \(\textcolor{colordef}{B}\textcolor{colorprop}{G}\) |
\(\textcolor{colordef}{G}\) | \(\textcolor{colordef}{G}\textcolor{colorprop}{B}\) | \(\textcolor{colordef}{G}\textcolor{colorprop}{G}\) |