Regular Expressions 101

^start of line

Non-Capturing Group(?:[IOQSXYZ]+|([A-HJ-NPRT-W])(?!.*\1))+

+repeats the group contents below at least once:

1st Alternative[IOQSXYZ]+

Character Class[IOQSXYZ]+

+matches at least one character from the set below:

Ithe literal I (73₁₀ / 111₈ / 49₁₆) (case sensitive)

Othe literal O (79₁₀ / 117₈ / 4F₁₆) (case sensitive)

Qthe literal Q (81₁₀ / 121₈ / 51₁₆) (case sensitive)

Sthe literal S (83₁₀ / 123₈ / 53₁₆) (case sensitive)

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

Ythe literal Y (89₁₀ / 131₈ / 59₁₆) (case sensitive)

Zthe literal Z (90₁₀ / 132₈ / 5A₁₆) (case sensitive)

2nd Alternative([A-HJ-NPRT-W])(?!.*\1)

Group 1([A-HJ-NPRT-W])

Character Class[A-HJ-NPRT-W]

A-Hone character from A (65₁₀) to H (72₁₀) (case sensitive)

J-None character from J (74₁₀) to N (78₁₀) (case sensitive)

Pthe literal P (80₁₀ / 120₈ / 50₁₆) (case sensitive)

Rthe literal R (82₁₀ / 122₈ / 52₁₆) (case sensitive)

T-Wone character from T (84₁₀) to W (87₁₀) (case sensitive)

Negative Lookahead(?!.*\1)

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

\1the text saved by group 1

$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

^(?:[IOQSXYZ]+|([A-HJ-NPRT-W])(?!.*\1))+$

New

ABCDEFGHIJKLMNOPQRSTUVWXYZ
ABBA
AIIIQSXXXSXH