import os

train_20_exs = []
label_file = open("train_20.csv", "r")
for line in label_file:
    line_list = line.strip().split(",")
    train_20_exs.append(line_list[0])
label_file.close()

train_60_exs = []
label_file = open("train_60.csv", "r")
for line in label_file:
    line_list = line.strip().split(",")
    train_60_exs.append(line_list[0])
label_file.close()

for i in train_60_exs:
    if i in train_20_exs:
        print(i)