1##fileformat=VCFv4.3
2##FORMAT=<ID=GT,Number=1,Type=String,Description="Genotype">
3##contig=<ID=1>
4##reference=ref.fa
5#CHROM POS ID REF ALT QUAL FILTER INFO FORMAT A B
61 10 . G T . . . GT 0/0 0/0
71 11 . G T . . . GT 0/0 1/1
81 12 . G T . . . GT 1/1 1/1
9