filterRegex.py

def fun(s):
    # return True if s is a valid email, else return False
    import re
    rex = re.compile("^[\w\-\_]+\@[a-zA-Z0-9]+\.\w{1,3}$")
    if rex.match(s):
        return True
    else:
        return False


def filter_mail(emails):
    return list(filter(fun, emails))

if __name__ == '__main__':
    n = int(input())
    emails = []
    for _ in range(n):
        emails.append(input())

filtered_emails = filter_mail(emails)
filtered_emails.sort()
print(filtered_emails)


#Sample Input
#2
#harsh@gmail
#iota_98@hackerrank.com