Here are some change-ringing related <a href=graphs-ps>Schreier graphs</a> produced by <a href=schreier.py>this program</a>, written in <a href=http://www.python.org>Python</a> and using <a href=http://www.graphviz.org/>Graphviz</a>.

<p>Colours:

<br>Doubles: <font color=blue>1,
<font color=red>3, <font color=darkgreen>5, <font color=lime>123, <font color=orange>125, <font color=magenta>145, <font color=cyan>345<font color=black>

<br>Minor: <font color=black>x,
<font color=brown>16, <font color=blue>14, <font color=lime>36, <font color=orange>12, <font color=red>34, <font color=purple>56, <font color=navy>1236, <font color=yellow>1456<font color=black>

<br>Major: <font color=black>x,
<font color=red>18, <font color=lime>36