I

Size: a a a
I

N
О
N
E
О
E
E
О
О
О
БГ
БГ
def is_phone_number(string: str):
numbers = "0123456789"
delimiters = "()-"
allowed = numbers + delimiters
if string[0] == "+":
string = string [1:]
return all((char in allowed) for char in string)А
E
E