Spy der Mann writes: "Yesterday, Radiohead decided to launch the solo album, "In Rainbows", with the option to pay what you think it is worth. In support of Radiohead's effort to revolutionize the Music Industry, Purebuttons, LLC just purchased "In Rainbows" for $1,000.00."
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals