ass="p">(</span><span class="n">k</span><span class="p">)</span> <span class="o">-</span> <span class="bp">self</span><span class="o">.</span><span class="n">_faultTolerance</span>
        <span class="n">c</span> <span class="o">=</span> <span class="n">_ab</span><span class="o">.</span><span class="n">_itertools</span><span class="o">.</span><span class="n">combinations</span><span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">n</span><span class="p">)</span>
        <