import re

#email = re.compile(r'([A-Za-z0-9]+[.-_])*[A-Za-z0-9]+@[A-Za-z0-9-]+(\.[A-Z|a-z]{2,})+')
#target = "hamedmehdi.official@protonmail.com"
#invalid = "hamedmehdi.official.com"

#if re.fullmatch(email, invalid) :
#    print("email is valid")
#else :
#    print("invalid email address")


##########################################


#s = "python for red-blue teams"

#if re.search("red", s) :
#    print("match")
#else:
#    print("no match")
    
#txt = "hacking the hacker is one of the best hacking experience"
#pattern = re.findall("hack", txt)
#print(pattern)


#[] -> [c-h]
#. -> any character -> "py..n"
#^ -> "^hello"
#$ -> "teams$"
#* -> "py.*n"
#+ ? {}   |


#[arm] 
#[a-n]
#[^arm]
#[0123]
#[0-9]
#[a-zA-Z]

#hamedmehdi.official@protonmail.com