gap> 
gap> h1:=(4,1,6,7);
(1,6,7,4)
gap> h2:=(4,6)(1,7);
(1,7)(4,6)
gap> h3:=(7,6,1,4);
(1,4,7,6)
gap> h4:=(2,3,8,5);
(2,3,8,5)
gap> h5:=(2,8)(3,5);
(2,8)(3,5)
gap> h6:=(3,2,5,8);
(2,5,8,3)
gap> G:=Group(h1,h2,h3,h4,h5,h6);
Group( (1,6,7,4), (1,7)(4,6), (1,4,7,6), (2,3,8,5), (2,8)(3,5), (2,5,8,3) )
gap> N:=Size(G);
16
gap> GroupId(G);
Error, the group library file 'groupid' must exist and be readable in
ReadGrp( "groupid" ) called from
main loop
brk> quit;
gap> ElementaryAbelian(G);
Error, Variable: 'ElementaryAbelian' must have a value
gap> quit;