**	line 1
**	line 1.5 inserted
**	line 2
**	line 3 changed
**	line 4
**	line 6
**	line a1
**	line a1.5 inserted
**	line a2
**	line a3 changed
**	line a4
**	line a6
**	line b1
**	line b1.5 inserted
**	line b1.6 inserted
**	line b2
**	line b3 changed
**	line b4 changed
**	line b6
**	line b7
**	line c1
**	line c1.5 inserted
**	line c1.6 inserted
**	line c2
**	line c3 changed
**	line c4 changed
**	line c6
**	line c7
