GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
############################################################################# ## #W id45.z GAP library of id's Hans Ulrich Besche ## ID_GROUP_TREE.next[45]:= rec( fp:= [ 1 ], next:= [ rec( fp:= [ 4 ], next:= [ rec( fp:= [ 1 ], next:= [ rec( fp:= [ 4, 5 ], next:= [ 11, 10 ] ) ] ) ] ) ] );