Valid Email Checker

You are given an email address as input. Your task is to determine whether the email is valid according to the following criteria:

• The email must contain exactly one '@' character, i.e. $$\#('@') = 1$$.
• The email is split into a local part (before the '@') and a domain part (after the '@'). Neither part may be empty.
• The domain part must contain at least one '.' character, i.e. $$\#('.') \ge 1$$.
• The local part must consist only of alphanumeric characters and the special characters ., _, -, and +.
• The domain part must consist only of alphanumeric characters, the dot . and the hyphen -.
• Both the local part and the domain part must start and end with an alphanumeric character.

For example, the email john.doe@example.com is valid, but .jane_doe@example.com is not valid because the local part does not start with an alphanumeric character.

inputFormat

The input consists of a single line containing a string which represents the email address to be validated.

You should read the input from the standard input (stdin).

outputFormat

Output a single line: True if the email is valid based on the criteria, and False otherwise.

The output should be written to the standard output (stdout).

john.doe@example.com

True