Regular Expressions 101

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/
B[lr]?il?aul?[td]
/
gm
B matches the character B with index 6610 (4216 or 1028) literally (case sensitive)
Match a single character present in the list below
[lr]
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
lr
matches a single character in the list lr (case sensitive)
i matches the character i with index 10510 (6916 or 1518) literally (case sensitive)
l
matches the character l with index 10810 (6C16 or 1548) literally (case sensitive)
au
matches the characters au literally (case sensitive)
l
matches the character l with index 10810 (6C16 or 1548) literally (case sensitive)
Match a single character present in the list below
[td]
td
matches a single character in the list td (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.

Regular Expression
No Match

/
/
gm

Test String