Regular Expressions 101

Pro

^start of line

Character Class[A-Z\d]{6}

{6}matches exactly 6 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\da digit

Non-Capturing Group(?:(, ?| )(?:[A-Z\d]{6}\1)*[A-Z\d]{6} *)?

?repeats the group contents below at most once:

Group 1(, ?| )

1st Alternative, ?

,the literal , (44₁₀ / 54₈ / 2C₁₆)

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

Non-Capturing Group(?:[A-Z\d]{6}\1)*

*repeats the group contents below any number of times:

Character Class[A-Z\d]{6}

{6}matches exactly 6 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\da digit

\1the text saved by group 1

Character Class[A-Z\d]{6}

{6}matches exactly 6 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\da digit

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

^[A-Z\d]{6}(?:(, ?| )(?:[A-Z\d]{6}\1)*[A-Z\d]{6} *)?$

New

KEPM39, JEMGH5, HEPM21
KEPM39 JEMGH5 HEPM21
KEPM39,JEMGH5,HEPM21
JEPM34, KEPM11 
JEPM34, KEPM11
JEPM34


KEPM39, JEMGH5 HEPM21, HEGD44    ZZZZZZ
KEPM39, JEMGH5 HEPM21