Features:
1. Parses text
2. Executes programs
3. CGI - Web forms, etc.
4. Supports RegExes (Perl and POSIX)
5. etc.
Task:
1. Print 'Hello World' to STDOUT
a. perl -c helloworld.pl - checks the syntax of the script
b. perl helloworld.pl - executes the script
c. chmod +x helloworld.pl && ./helloworld.pl
2. Parse RegExes from the command line
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