Regular Expressions 101

^start of string

Non-Capturing Group(?:(?=(\1.|)(.))){1,850}?

{1,850}?repeats the group contents below between 1 and 850 times:

Positive Lookahead(?=(\1.|)(.))

Group 1(\1.|)

1st Alternative\1.

\1the text saved by group 1

.any character (except for line terminators)

2nd Alternative — matches an empty string

Group 2(.)

.any character (except for line terminators)

Negative Lookahead(?!.*\2.*\2)

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

\2the text saved by group 2

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

\2the text saved by group 2

\1the text saved by group 1

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

\2the text saved by group 2

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

^(?:(?=(\1.|)(.))){1,850}?(?!.*\2.*\2)\1\K\2

New

b|Q.W'Gdo1[nX'p>hjF/!@)7\j?L*@dAB$`nR5wQ&jaR{`C"Zbi,cWe/<jwX]sL7GQ`S>^fr~xuP1w%I|:AW!MwTi~rAq?>a&7-5x46q"^@G>JB.~=WbIB}GC:"?

b|Q.W'Gdo1[nX'p>hjF/!@)7\j?L*@dAB$`nR5wQ&jaR{`C"Zbi,cWe/<jwX]sL7GQ`S>^fr~xuP1w%I|:AW!MwTi~rAq?>a&7-5x46q"^@G>JB.~=WbIB}GC:"?