\documentclass{article}
\usepackage{amsmath}
\usepackage{bidi}
\begin{document}
\setRTL
\[\rcases{{\rcases{\rcases{\text{man}\cr\text{woman}}\text{man}\cr\text{woman}}\rcases{\text{man}\cr\text{woman}}\text{man}}\cr\text{woman}}
\text{human beings}
\]
\end{document}