@HD	VN:1.6	SO:coordinate
@SQ	SN:chr1	LN:1000
@SQ	SN:chr2	LN:600
read1	0	chr1	101	60	10M	*	0	0	AAAAAAAAAA	IIIIIIIIII
read2	0	chr1	106	60	10M	*	0	0	AAAAAAAAAA	IIIIIIIIII