Regular Expressions 101

Explanation

Pro

^start of line

Group 1((0[1-9]|[1-4][0-9]|5[0-6])( +|$)){6}

{6}repeats the group contents below exactly 6 times:

Group 2(0[1-9]|[1-4][0-9]|5[0-6])

1st Alternative0[1-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative[1-4][0-9]

Character Class[1-4]

1-4one character from 1 (49₁₀) to 4 (52₁₀)

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

3rd Alternative5[0-6]

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

Character Class[0-6]

0-6one character from 0 (48₁₀) to 6 (54₁₀)

Group 3( +|$)

1st Alternative +

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

2nd Alternative$

$end of line

Negative Lookbehind(?<! )

the literal (32₁₀ / 40₈ / 20₁₆)

$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

^((0[1-9]|[1-4][0-9]|5[0-6])( +|$)){6}(?<! )$

New

33 44 51 52 53 56 
33 44 51 52 53 59
33 44 51 52 55 55
00 00 00 00 00 00