import re
flag=0
passwd=input(“Enter your password”)
if not re.search(‘[a-z]’,passwd):
flag = 1
if not re.search(‘[0-9]’,passwd):
flag = 1
if not re.search(‘[A-Z]’,passwd):
flag=1
if not re.search(‘[$@#!]’,passwd):
flag = 1
if len(passwd)<6:
flag = 1
if (flag == 0):
print(“password is valid:”)
else:
print(“password is invalid:”)