# import subprocess
import re
import sys

def process_lines(object):
    for i in object:
        if regexp.search(i):
            # print(i)
            yield i

if __name__ == '__main__':
    regexp = re.compile(r"\d+..{1,}")
    try:
        with open(sys.argv[1],"r") as file1, open(sys.argv[2],"r") as file2, open(sys.argv[3],"w+") as res_file:
            first = [y.strip() for y in process_lines(file1) if regexp.search(y)]
            first = set(first)
            second = [y.strip() for y in process_lines(file2) if regexp.search(y)]
            second = set(second)
            for kek in process_lines(second.intersection(first)):
                res_file.write(kek + '\n')
        # print(second.intersection(first))
    except IndexError as e:
        print("We need two files")