#Example: "B2-4" . . . the ``right'' way to generate B(2, 4)
#Generates B(2, 4) by using the `Exponent' option
#vars: F, procId;
#options: 
F := FreeGroup("a", "b");
#alt: do
#procId := PqStart( F );
#alt: sub <procId> for <F>
Pq( F : Prime := 2, Exponent := 4 );
