# your code goes here
import re
pattern = "[a-z]_([0-9])*@([0-9])*[a-z]*\.gmail.edu"
string = "ab_12@123g.gmail.edu"
if (re.search(pattern, string)):
print("Valid string")
else:
print("Not valid")
IyB5b3VyIGNvZGUgZ29lcyBoZXJlCmltcG9ydCByZQoKcGF0dGVybiA9ICJbYS16XV8oWzAtOV0pKkAoWzAtOV0pKlthLXpdKlwuZ21haWwuZWR1IgpzdHJpbmcgPSAiYWJfMTJAMTIzZy5nbWFpbC5lZHUiCgppZiAocmUuc2VhcmNoKHBhdHRlcm4sIHN0cmluZykpOgoJcHJpbnQoIlZhbGlkIHN0cmluZyIpCmVsc2U6CglwcmludCgiTm90IHZhbGlkIikK