order. That is, for each adjacent element pair
                <code class="computeroutput"><span class="special">[</span><span class="identifier">x</span><span class="special">,</span><span class="identifier">y</span><span class="special">]</span></code> of <code class="computeroutput"><span class="identifier">rng2</span></code>,
                <code class="computeroutput"><span class="identifier">y</span> <span class="special">&lt;</span>
                <span class="identifier">x</span> <span class="spe