Regular Expressions 101

Positive Lookbehind(?<=^0{0,100}[^\W0]\w{3,100})

^start of line

0{0,100}the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated between 0 and 100 times

Negated Character Class[^\W0]

\Wany non-word character

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\w{3,100}any word character, repeated between 3 and 100 times

\wany word character

Positive Lookahead(?=\w{4,}$)

\w{4,}any word character, repeated at least 4 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.

Search reference

Regular Expression

(?<=^0{0,100}[^\W0]\w{3,100})\w(?=\w{4,}$)

New

0001113033AA55608981
23456237472347823923
00000000090000000000
09008000800060050000
AAAABBBBCCCCDDDDEEEE
0000BBBBCCCCDDDDEEEE