# encoding: utf-8

import sys

file_in = file('db.txt','r')
file_out = file('copy.txt','w')

for line in file_in:
    for i in range(0,len(line)):
        if line[i]!="\n":
            sys.stdout.write(line[i]+',')
        else:
            sys.stdout.write(line[i])

        file_out.write(line[i])

sys.stdout.write("\n")

file_in.close()
file_out.close()

"""
# db.txt
1111
2222
ssss
wwww
5555
"""