text: overrepresent_sequence="GATGCACATCTGCTTTATATATCTTGTGGCACCGAGTCGGAGATCGGAAG"
  library="/scratch/h_vangard_1/wangj52/Bill/Caleb-MV411-CRISPR_screen/MAGeCK/numbered_brunello_validation_library.txt"
  
  with open(library, "rt") as fin:
    for line in fin:
      parts=line.rstrip().split('\t')
      if parts[1] in overrepresent_sequence:
        print(parts)