.NET Regex Tester - Regex Storm

Pattern

Input

valid are 
A
A.
A,
A'S
invalid are 
 A 
 A
 B
A@
A!

Options

Ignore Case

Ignore Whitespace

Explicit Capture

Culture Invariant

Singleline

Multiline

Right To Left

ECMA Script

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Replacement

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2 matches found in about 2 milliseconds.

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Permalink

Index	Position	Matched String	$1	$2
0	0	valid are	valid are A A. A, A'S invalid are A A B	whitespace 2 captures are whitespace
1	12	A A. A, A'S invalid are	A A. A, A'S invalid are A A B	whitespace 2 captures are whitespace

valid are 
A
A.
A,
A'S
invalid are 
 A 
 A
 B
A@
A!