sgrep(1) on Linux
The text c8184763873c, as Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 1.3 (Bo), Debian 1.2 (Rex) shipped it.
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