import re
def fun(s):
    try:
        username, website = s.split("@")
        web, extension = website.split(".", 1)
    except ValueError:
        return False

    username_pattern = r'^[a-zA-Z0-9_-]+$'
    web_pattern = r'^[a-zA-Z0-9]+$'
    extension_pattern = r'^[a-z]+$'

    if re.match(username_pattern, username) and re.match(web_pattern, web) and re.match(extension_pattern, extension) and 1<= len(extension)<=3:
        return True
    return False

import re
pattern =r"^[a-zA-Z0-9_%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,3}$"
def fun(s):
    # return True if s is a valid email, else return False
    return re.match(pattern, s )

import re
def fun(s):
    # return True if s is a valid email, else return False
    return bool(re.fullmatch(r"[\w-]+@[a-z0-9]+\.[a-z]{1,3}",s,re.I))

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)

return re.fullmatch(r'[a-z0-9_-]+@[a-z0-9]+\.[a-z]{1,3}',s,re.I)