tee(1) on FreeBSD
The text 8c6f6c753679, as FreeBSD 2.2.2-RELEASE, FreeBSD 2.1.7.1-RELEASE, FreeBSD 2.1.7-RELEASE, FreeBSD 2.1.5-RELEASE, FreeBSD 2.0.5-RELEASE shipped it.
pipe fitting
Flags it lists
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-a -
-i