regex101: PCRE (Legacy) Match Workspace

Explanation

Pro

^start of line

Group 1(.*?([^s](?=.*?h.*?m.*?p)|s).*?([^h](?=.*?m.*?p)|h).*?([^m](?=.*?p)|m).*?.)

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

Group 2([^s](?=.*?h.*?m.*?p)|s)

1st Alternative[^s](?=.*?h.*?m.*?p)

Negated Character Class[^s]

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

Positive Lookahead(?=.*?h.*?m.*?p)

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

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

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

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

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

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

2nd Alternatives

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

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

Group 3([^h](?=.*?m.*?p)|h)

1st Alternative[^h](?=.*?m.*?p)

Negated Character Class[^h]

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

Positive Lookahead(?=.*?m.*?p)

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

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

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

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

2nd Alternativeh

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

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

Group 4([^m](?=.*?p)|m)

1st Alternative[^m](?=.*?p)

Negated Character Class[^m]

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

Positive Lookahead(?=.*?p)

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

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

2nd Alternativem

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case sensitive)

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

.any character (except for line terminators)

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

Quick Reference

25 tokens

Regular Expression

^(.*?([^s](?=.*?h.*?m.*?p)|s).*?([^h](?=.*?m.*?p)|h).*?([^m](?=.*?p)|m).*?.)

shampoo
shanpoo
sharpoo
thampoo
tharpoo