import re
import hashlib
def email(email):
    if(email):
        pattern=r"^[a-zA-Z0-9]{1,100}[@][a-z]{2,6}\.[a-z]{2,4}"
        number_re=re.compile(pattern)
        if number_re.findall(email):
            return email
        else:
            return ""
    else:
        return ""
def password(password):
    if(password):
        if(len(password) >= 8):
            return password
        else:
            return ""
    else:
        return ""