https://github.com/phieulang1993/ctf-writeups/blob/master/2018/ISITDTU%20CTF%202018%20Quals/encode/encode.py

Original writeup (https://github.com/phieulang1993/ctf-writeups/blob/master/2018/ISITDTU%20CTF%202018%20Quals/encode/encode.py).