ssh(1) on macOS
The text 2dac73b904fc, as Mac OS X 10.8.5, Mac OS X 10.8.4, Mac OS X 10.8.3, Mac OS X 10.8.2, Mac OS X 10.8.1, Mac OS X 10.8 shipped it.
OpenSSH SSH client (remote login program)
Flags it lists
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-y