##fileformat=VCFv4.3
##FORMAT=<ID=GT,Number=1,Type=String,Description="Genotype">
##contig=<ID=1>
##reference=ref.fa
#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO	FORMAT	A	B
1	10	.	G	T	.	.	.	GT	0/0	0/0
1	11	.	G	T	.	.	.	GT	0/0	1/1
1	12	.	G	T	.	.	.	GT	1/1	1/1
