import re
input1 = '3787381001'
pattern = re.compile('10*1')
m = pattern.search(input1)
if m:
print(m.group())
print(re.findall(r'(?=(10*1))', "23100100013"))
aW1wb3J0IHJlCmlucHV0MSA9ICczNzg3MzgxMDAxJwpwYXR0ZXJuID0gcmUuY29tcGlsZSgnMTAqMScpCm0gPSBwYXR0ZXJuLnNlYXJjaChpbnB1dDEpCmlmIG06CglwcmludChtLmdyb3VwKCkpCgkKcHJpbnQocmUuZmluZGFsbChyJyg/PSgxMCoxKSknLCAiMjMxMDAxMDAwMTMiKSk=