from datetime import datetime

in_file = open("eprek.txt", "r")
out_file = open("eprek_res.txt", "w")

DT_FORMAT = '%d.%m.%y'


def parse_dt(text):
    return datetime.strptime(text, DT_FORMAT)

for line in in_file:
    line = line.strip()
    columns = line.split()
    if len(columns) != 0:
        if line[0].isdigit():
            if len(columns) < 15:
                continue
            date1 = parse_dt(columns[14])
            date2 = parse_dt(columns[7])
            date3 = parse_dt(columns[8])
            if date1.month != date2.month or date1.month != date3.month:
                out_file.write(line+"\n")
        else:
            out_file.write(line+"\n")
    else:
        out_file.write("\n")

in_file.close()
out_file.close()