Email Validation

Given an email address, your task is to determine whether it is valid. An email address is considered valid if it meets the following criteria:

• It contains exactly one '@' symbol separating the local part from the domain.
• The local part consists of alphanumeric characters and may include '.', '_' or '-' provided that these symbols are not consecutive, and they do not appear at the beginning or end.
• The domain part consists of alphanumeric characters and may include '-' or '.', but these symbols cannot be consecutive. The domain must include a dot separating it from the top-level domain (TLD).
• The TLD must have at least 2 alphabetic characters.

If the email address is valid according to the above rules, output \(1\); otherwise, output \(0\).

inputFormat

A single line from standard input containing an email address string.

outputFormat

A single integer printed to standard output: 1 if the email address is valid; otherwise, 0.## sample

example.user@domain.com

1