Regular Expressions 101

Explanation

Pro

^start of string

Group 1(Subject:)

Subject:the literal text Subject: (case sensitive)

Group 2(.*)

.*any character (except for line terminators), repeated any number of times

Group 3(.{2})

.{2}any character (except for line terminators), repeated exactly 2 times

$end of string, or before its final line terminator

Detailed match information will be displayed here automatically.

25 tokens

^(Subject:)(.*)(.{2})$

Subject: =?windows-1252?B?VGhpcyBpcyB0aGUgb3JpZ2luYWwgc3ViamVjdA==?=

Subject: =?windows-1252?B?VGhpcyBpcyB0aGUgb3JpZ2luYWwgc3ViamVjdA==?=