Regular Expressions 101

^start of line

Group 1(.*([^\n@].{15}|.[^\na].{14}|.{2}[^\nb].{13}|.{3}[^\nc].{12}|.{4}[^\nd].{11}|.{5}[^\ne].{10}|.{6}[^\nf]).{9}|.{7}[^\ng].{8}|.{8}[^\nh].{7}|.{9}[^\ni].{6}|.{10}[^\nj].{5}|.{11}[^\nk].{4}|.{12}[^\n.].{3}|.{13}[^\nc].{2}|.{14}[^\no].|.{15}[^\nm]|.{0,15})

1st Alternative.*([^\n@].{15}|.[^\na].{14}|.{2}[^\nb].{13}|.{3}[^\nc].{12}|.{4}[^\nd].{11}|.{5}[^\ne].{10}|.{6}[^\nf]).{9}

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

Group 2([^\n@].{15}|.[^\na].{14}|.{2}[^\nb].{13}|.{3}[^\nc].{12}|.{4}[^\nd].{11}|.{5}[^\ne].{10}|.{6}[^\nf])

1st Alternative[^\n@].{15}

Negated Character Class[^\n@]

\na line-feed (newline) character (ASCII 10)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

.{15}any character (except for line terminators), repeated exactly 15 times

2nd Alternative.[^\na].{14}

.any character (except for line terminators)

Negated Character Class[^\na]

\na line-feed (newline) character (ASCII 10)

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

.{14}any character (except for line terminators), repeated exactly 14 times

3rd Alternative.{2}[^\nb].{13}

.{2}any character (except for line terminators), repeated exactly 2 times

Negated Character Class[^\nb]

\na line-feed (newline) character (ASCII 10)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

.{13}any character (except for line terminators), repeated exactly 13 times

4th Alternative.{3}[^\nc].{12}

.{3}any character (except for line terminators), repeated exactly 3 times

Negated Character Class[^\nc]

\na line-feed (newline) character (ASCII 10)

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

.{12}any character (except for line terminators), repeated exactly 12 times

5th Alternative.{4}[^\nd].{11}

.{4}any character (except for line terminators), repeated exactly 4 times

Negated Character Class[^\nd]

\na line-feed (newline) character (ASCII 10)

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

.{11}any character (except for line terminators), repeated exactly 11 times

6th Alternative.{5}[^\ne].{10}

.{5}any character (except for line terminators), repeated exactly 5 times

Negated Character Class[^\ne]

\na line-feed (newline) character (ASCII 10)

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

.{10}any character (except for line terminators), repeated exactly 10 times

7th Alternative.{6}[^\nf]

.{6}any character (except for line terminators), repeated exactly 6 times

Negated Character Class[^\nf]

\na line-feed (newline) character (ASCII 10)

fthe literal f (102₁₀ / 146₈ / 66₁₆) (case sensitive)

.{9}any character (except for line terminators), repeated exactly 9 times

2nd Alternative.{7}[^\ng].{8}

.{7}any character (except for line terminators), repeated exactly 7 times

Negated Character Class[^\ng]

\na line-feed (newline) character (ASCII 10)

gthe literal g (103₁₀ / 147₈ / 67₁₆) (case sensitive)

.{8}any character (except for line terminators), repeated exactly 8 times

3rd Alternative.{8}[^\nh].{7}

.{8}any character (except for line terminators), repeated exactly 8 times

Negated Character Class[^\nh]

\na line-feed (newline) character (ASCII 10)

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

.{7}any character (except for line terminators), repeated exactly 7 times

4th Alternative.{9}[^\ni].{6}

.{9}any character (except for line terminators), repeated exactly 9 times

Negated Character Class[^\ni]

\na line-feed (newline) character (ASCII 10)

ithe literal i (105₁₀ / 151₈ / 69₁₆) (case sensitive)

.{6}any character (except for line terminators), repeated exactly 6 times

5th Alternative.{10}[^\nj].{5}

.{10}any character (except for line terminators), repeated exactly 10 times

Negated Character Class[^\nj]

\na line-feed (newline) character (ASCII 10)

jthe literal j (106₁₀ / 152₈ / 6A₁₆) (case sensitive)

.{5}any character (except for line terminators), repeated exactly 5 times

6th Alternative.{11}[^\nk].{4}

7th Alternative.{12}[^\n.].{3}

8th Alternative.{13}[^\nc].{2}

9th Alternative.{14}[^\no].

10th Alternative.{15}[^\nm]

11th Alternative.{0,15}

$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

x

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25 tokens

Regular Expression

^(.*([^\n@].{15}|.[^\na].{14}|.{2}[^\nb].{13}|.{3}[^\nc].{12}|.{4}[^\nd].{11}|.{5}[^\ne].{10}|.{6}[^\nf]).{9}|.{7}[^\ng].{8}|.{8}[^\nh].{7}|.{9}[^\ni].{6}|.{10}[^\nj].{5}|.{11}[^\nk].{4}|.{12}[^\n.].{3}|.{13}[^\nc].{2}|.{14}[^\no].|.{15}[^\nm]|.{0,15})$

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