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ORDER #1
Hello, letters!
Match only lowercase letters from "a" to "z". No numbers allowed!
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Match These
abc ✗hello ✗regex ✗
Don't Match
123 ·abc123 ·Hello · ·
ORDER #2
Numbers only, please
Match sequences that contain only digits from 0 to 9.
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Match These
123 ✗0 ✗999 ✗
Don't Match
12a3 ·abc ·3.14 ·
ORDER #3
It starts with "a"
Match words that start with the letter "a" (lowercase).
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Match These
apple ✗avocado ✗art ✗
Don't Match
Apple ·banana ·cherry ·1abc ·
ORDER #4
Ending matters
Match words that end with "ing".
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Match These
running ✗coding ✗learning ✗
Don't Match
runner ·ing ·codingz ·
ORDER #5
At least three
Match words with at least 3 lowercase letters in a row.
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Match These
abc ✗test ✗regex ✗
Don't Match
ab ·a ·12 ·
ORDER #6
This or that
Match words that are exactly "cat" OR "dog".
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Match These
cat ✗dog ✗
Don't Match
cats ·doggy ·fish ·
ORDER #7
Captured group
Match strings in the format "abc" followed by "123" — exactly 3 letters then 3 digits.
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Match These
abc123 ✗xyz999 ✗lol420 ✗
Don't Match
abc12 ·ab1234 ·123abc ·
ORDER #8
Space it out
Match strings that contain at least one space character.
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Match These
hello world ✗good morning ✗a b ✗
Don't Match
helloworld ·goodmorning ·abc ·
ORDER #9
Simple email
Match email addresses in the format text@text.com — letters, an "@", letters, ".com".
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Match These
user@example.com ✗test@domain.com ✗a@b.com ✗
Don't Match
user@.com ·@domain.com ·user@domain ·user@domain.org ·
ORDER #10
Quantifier master
Match strings that have between 5 and 10 lowercase letters (letters only).
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Match These
abcde ✗abcdefghij ✗keyboard ✗
Don't Match
abcd ·abcdefghijk ·abc1 · ·