LaTeX.org

I'm having difficulty in sorting my index entries, here is my mwe

\documentclass[a4paper,12pt]{report}
\usepackage{imakeidx}
\makeindex[options=-s ./index.ist,columnseprule,intoc,columns=2]
\begin{document}

\subsubsection{The back of your bra rides up towards your shoulder}
If the back of the ...