##fileformat=VCFv4.1
##FORMAT=<ID=GT,Number=1,Type=String,Description="Genotype">
##contig=<ID=ref>
#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO	FORMAT	sample
ref	2	.	A	T	500.0	.	.	GT	0/1
ref	2	.	AAAAAA	A	500.0	.	.	GT	0/0
ref	20	.	G	A	500.0	.	.	GT	0/1
ref	20	.	G	C	500.0	.	.	GT	0/1
