Bank of Singapore's Employee Email Address Formats

Bank of Singapore uses 3 email formats, with first '.' last (ex. john.smith@bankofsingapore.com)
being used 85% of the time.
first lastjohnsmith@bankofsingapore.com1%
first '.' lastjohn.smith@bankofsingapore.com85%
other_templateother_template@bankofsingapore.com14%