Passing thought on hash reversal of simple hashes.

hash.py

#!/usr/bin/env python
import hashlib
import sys
m = hashlib.md5()
for x in range(1000,9999):
	ext = str(x)
	m.update(ext+":asterisk:"+ext)
	if m.hexdigest() == sys.argv[1]:
		print ext 
		print m.hexdigest()