Unique Email Addresses
Every valid email consists of name and domain, separated by the '@' sign. Besides lowercase letters, the email may contain one or more '.' or '+'. For example, in "alex@checkio.org", "alex" is the name, and "checkio.org" is the domain.
If you add periods '.' between some characters in the name part of an email address, mail sent there will be delivered to the same address without dots in the name. Note that this rule does not apply to domain names....
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