# -*- coding: utf-8 -*-

import re

examples = [
    "please send to 13LJSSj14J8eGof3NyDoUyUijQLSwrdi7v instead because I want to scam you",
    "I sent the package, here is the tracking number 12983LTRTSA"
]

RE = re.compile('([13][123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{26,33})')

for n, ex in enumerate(examples):
    s = RE.search(ex)
    if s:
        print '%d found: %s' % (n, s.groups()[0])
    else:
        print '%d not found.' % (n)