Regular Expressions 101

Pro

Group 1([A-za-z]{2}\d{4}|[A-za-z]{4}\d{2})

1st Alternative[A-za-z]{2}\d{4}

Character Class[A-za-z]{2}

{2}matches exactly 2 characters from the set below:

A-zone character from A (65₁₀) to z (122₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\d{4}a digit, repeated exactly 4 times

2nd Alternative[A-za-z]{4}\d{2}

Character Class[A-za-z]{4}

{4}matches exactly 4 characters from the set below:

A-zone character from A (65₁₀) to z (122₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\d{2}a digit, repeated exactly 2 times

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.

26 tokens

([A-za-z]{2}\d{4}|[A-za-z]{4}\d{2})

New

AABB12
BBAA12
AA12AA
BBAA12
AA1212