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chr1 100 300 chr1 100 300 chr1 100 300 chr1 100 300 chr1 100 300 chr1 100 300 chr1 100 300 chr1 100 300 chr2 100 300 chr2 100 300 chr2 100 300 chr2 100 300 chr2 100 300 chr2 100 300 chr2 100 300 chr2 100 300