Two, 4, 6, Eight
Perl is cryptic
Perl is great
1, Three
Five, 7
Write in Perl
Programmer's heaven


Searching for: Perl
Perl is cryptic
Perl is great
Write in Perl


Searching for: ^Perl
Perl is cryptic
Perl is great


Searching for: i
Two, 4, 6, Eight
Perl is cryptic
Perl is great
Five, 7
Write in Perl


Searching for: \si
Perl is cryptic
Perl is great
Write in Perl


Searching for: \d
Two, 4, 6, Eight
1, Three
Five, 7


Searching for: \d+.+
Two, 4, 6, Eight
1, Three


Searching for: \d+$
Five, 7


Searching for: \d.*\d
Two, 4, 6, Eight


Searching for: \b\w{4}\b
Perl is cryptic
Perl is great
Five, 7
Write in Perl


Searching for: \w+\s+\w+\s+\w+
Perl is cryptic
Perl is great
Write in Perl


Searching for: e.*e
Perl is great
1, Three
Write in Perl
Programmer's heaven


Substituting first Perl words.
Two, 4, 6, Eight
Pascal is cryptic
Pascal is great
1, Three
Five, 7
Write in Perl
Programmer's heaven


Searching for: \b\w{5}\b
Two, 4, 6, Amazing
Pascal is cryptic
Pascal is Amazing
1, Amazing
Five, 7
Amazing in Perl
Programmer's heaven


Substituting Final Perl 
Two, 4, 6, Amazing
Pascal is cryptic
Pascal is Amazing
1, Amazing
Five, 7
Amazing in Cobol
Programmer's heaven


Substituting null strings
Two, 4, 6, Amazing
Pascal is cryptic
Pascal is Amazing
1, Amazing
Five, 7
Amazing in Cobol
Programmer heaven


Tagging Parts and Switching Places
Grabbed pattern: (\d)(.*)(\d)   $1 = 4   $2 = ,    $3 = 6

Two, 6, 4, Amazing
Pascal is cryptic
Pascal is Amazing
1, Amazing
Five, 7
Amazing in Cobol
Programmer heaven


Expanding Patterns, and apply more than once in the same line

Two, 666, 444, Amazing
Pascal is cryptic
Pascal is Amazing
111, Amazing
Five, 777
Amazing in Cobol
Programmer heaven


Replacing words that end with n 
Grabbed pattern: \b(\w*)n\b   $1 = i   
Grabbed pattern: \b(\w*)n\b   $1 = heave   

Two, 666, 444, Amazing
Pascal is cryptic
Pascal is Amazing
111, Amazing
Five, 777
Amazing is Cobol
Programmer heaves


Searching for: (\w+\s+)(\w+)(\s+\w+)
Two, 666, 444, Amazing
Pascal isn't cryptic
Pascal isn't Amazing
111, Amazing
Five, 777
Amazing isn't Cobol
Programmer heaves


Searching for: [oe]
Twx, 666, 444, Amazing
Pascal isn't cryptic
Pascal isn't Amazing
111, Amazing
Fivx, 777
Amazing isn't Cxbxl
Prxgrxmmxr hxavxs