##fileformat=VCFv4.2
##contig=<ID=1,length=1000000>
##FORMAT=<ID=AS,Number=1,Type=Integer,Description="ALT allele support count">
#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO	FORMAT	S1	S2
1	100	rs1	A	T	.	PASS	.	AS	2	1
1	200	rs2	G	C	.	PASS	.	AS	1	2
1	300	rs3	C	A	.	PASS	.	AS	2	1
