$ fgrep blah <foo.txt | consolidate | dump
$ preproc <foo.txt | fgrep blah | consolidate | dump
$ additional <foo.txt | preproc | fgrep blah | consolidate | dump

# vs

$ cat foo.txt | fgrep blah | consolidate | dump
$ cat foo.txt | preproc | fgrep blah | consolidate | dump
$ cat foo.txt bar.txt | additional | preproc | fgrep blah | consolidate | dump
$ real_stream | additional | preproc | fgrep blah | consolidate | dump

##</code><code>##

$ < foo.txt fgrep blah | consolidate | dump
$ < foo.txt preproc | fgrep blah | consolidate | dump
$ < foo.txt additional | preproc | fgrep blah | consolidate | dump

##</code><code>##

$ < foo.txt fgrep blah | consolidate | dump
$ < foo.txt preproc | fgrep blah | consolidate | dump
$ <(cat foo.txt bar.txt) additional | preproc | fgrep blah | consolidate | dump
$ real_stream | additional | preproc | fgrep blah | consolidate | dump