import collections

def parse_array():
  with open("log_16-aa") as log_file:

    # rearrange data
    lines_parsed = []
    lines = log_file.readlines()
    for line in lines:
      if "iv[0]" in line:
        line_splitted = line.split()[2::3]
        lines_parsed.append(line_splitted)

    # create histogram
    histogram = {}
    for i in range(len(lines_parsed)):
      for j in range(len(lines_parsed[i])):
        histogram[j] = histogram.get(j, [])
        histogram[j].append(lines_parsed[i][j])

    # iterate histogram
    for position, values in histogram.items():
      print(collections.Counter(values))

parse_array()