はい

about; concerning

The address or name of the recipient to whom mail or an email is sent.

House number

Approval, endorsement; support or agreement with an idea.

Too, also.

And then; and (used to connect sentences or clauses).

And; and so forth (used to list examples, implying others exist).

Indicates a non-exhaustive list of actions/states ('and so on').

Notice; an announcement or communication.

A thing said, written, or done as a reaction to a question or statement.