Lindo crackme para pasar el tiempo

Key: 6x0d13ezuu
keygen.py
#!/usr/bin/env python2
import random
serial = [1,2,3,4,5,6,7,8,9,0]
serial_string = ""
for x in range(0,10):
serial[x] = random.randint(ord('a'),ord('z'))
serial[0] = random.randint(ord('0'),ord('z'))
serial[5] = 9 + 96 - serial[0]
serial[1] = random.randint(ord('a'),ord('z'))
serial[4] = ((serial[1] + serial[0] + serial[5] - 144) % 10) + 48
serial[2] = random.randint(ord('0'),ord('2'))
serial[3] = random.randint(ord('6'),ord('z'))
for x in serial:
serial_string += str(chr(x))
print serial_string
B#