# DB 7 Header line.
chr1	5	25	d7_1	100	+
chr1	65	75	d7_2	100	-
chr1	95	100	d7_3	100	+
chr2	5	25	d7_4	100	-
chr2	65	75	d7_5	100	.
chr2	95	100	d7_6	100	-
chr3	5	25	d7_7	100	+
chr3	65	75	d7_8	100	-
chr3	95	100	d7_9	100	.