Question: Please concatenate this file with this one to a single text file. The content of the output file should look like below.

Expected output: 

x,y
3,5
4,9
6,10
7,11
8,12
6,10
8,18
12,20
14,22
16,24

Hint 1: Use pandas  to open the two files as data frames and the concat  method to concatenate the data frames.

Hint 2: Once you have loaded the files with pandas.read_csv  and concatenated with concat , use the to_csv  method with index=None  to export to a new file.