[detailed write-up on github](https://github.com/shellc0d3/CTFwriteups/tree/master/ijctf2020/vault)```python#!/usr/bin/python2import random
num_list = []num_list.append(['0', '1'])num_list.append(['4', '5', '6'])num_list.append(['5', '6', '7', '8', '9'])num_list.append(['1', '2', '3', '4'])num_list.append(['0', '1', '2', '5', '8', '9'])num_list.append(['0', '1'])
for l in num_list:    code = ''    for i in range(2000):            code += random.choice(l)    print code```