s,  that  is  lists  of  integers  in <code>1:length(S)</code>. The functions &#39;word&#39;  and &#39;W(...)&#39; do the conversion between Coxeter words and elements of the group.</p><p><strong>Examples</strong></p><pre><code class="language-julia-repl hljs">julia&gt; W=coxsym(4)
ùîñ ‚ÇÑ

julia&gt; p=W(1,3,2,1,3)
(1,4)

julia&gt; word(W,p)
5-element Vector{Int64}:
 1
 2
 3
 2
 1</code></pre><p>We  notice that the word we started with and the one that we ended up with, are  not the same, even tho