# Problem with the Hint 2 (Positive and Negative Lookahead) **URL:** \ **Category:** freeCodeCamp Contributors\ **Tags:** contributing\ **Created:** [March 6, 2021, 1:58pm UTC](https://forum.freecodecamp.org/t/problem-with-the-hint-2-positive-and-negative-lookahead/449862 "2021-03-06T13:58:33Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![MarcosSouza](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/marcossouza/32/220070_2.png) [@MarcosSouza](https://forum.freecodecamp.org/u/MarcosSouza)\ **Post date:** [March 6, 2021, 1:58pm UTC](https://forum.freecodecamp.org/t/problem-with-the-hint-2-positive-and-negative-lookahead/449862/1 "2021-03-06T13:58:33Z")
Hello! The problem is related to the Hint 2 ([freeCodeCamp Challenge Guide: Positive and Negative Lookahead](https://forum.freecodecamp.org/t/freecodecamp-challenge-guide-positive-and-negative-lookahead/301360)) of the challenge " Positive and Negative Lookahead" ([https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/regular-expressions/positive-and-negative-lookahead](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/regular-expressions/positive-and-negative-lookahead)) The Hint 2 finishes with “Remember to specify the exact amount of numbers you want to appear at the end of the string.” But the checklist in the challenge says that “Your regex should match the string astr1on11aut”. I’m novice, so I might be wrong, but I think that it should be like “Remember to specify the exact amount of numbers you want to appear consecutively on the string.” Anyway, if I’m wrong, I’m sorry and, if it’s possible, explain me why it is right. Kind regards! Marcos. ---
**Author:** ![evidence357](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/evidence357/32/134214_2.png) [@evidence357](https://forum.freecodecamp.org/u/evidence357)\ **Post date:** [March 29, 2021, 4:04pm UTC](https://forum.freecodecamp.org/t/problem-with-the-hint-2-positive-and-negative-lookahead/449862/2 "2021-03-29T16:04:00Z")
Hi Marcos, Remember this paragraph from the first lesson or challenge in the Regular Expressions course ([https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/regular-expressions/using-the-test-method](https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/regular-expressions/using-the-test-method))? I quote it below: " _If you want to find the word `the` in the string `The dog chased the cat` , you could use the following regular expression: `/the/` . **Notice that quote marks are not required within the regular expression**._ " With that understanding, I think the statement you referenced from Hint 2 is talking about the string that you put in **myRegex**. So this is what I think it meant to communicate : Remember to specify the exact amount of numbers you want to appear at the end of the _ **regex** _ string. I think thus that your concern is legitimate. Best regards. ---
**Author:** ![MarcosSouza](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/marcossouza/32/220070_2.png) [@MarcosSouza](https://forum.freecodecamp.org/u/MarcosSouza)\ **Post date:** [March 29, 2021, 5:34pm UTC](https://forum.freecodecamp.org/t/problem-with-the-hint-2-positive-and-negative-lookahead/449862/3 "2021-03-29T17:34:40Z")
Thanks! That makes more sense now! Thank you so much!! =D ---
**Author:** ![evidence357](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/evidence357/32/134214_2.png) [@evidence357](https://forum.freecodecamp.org/u/evidence357)\ **Post date:** [March 29, 2021, 5:36pm UTC](https://forum.freecodecamp.org/t/problem-with-the-hint-2-positive-and-negative-lookahead/449862/4 "2021-03-29T17:36:10Z")
Welcome Marcos. I’m glad. ---
**Author:** ![good.answer.e](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/good.answer.e/32/185281_2.png) [@good.answer.e](https://forum.freecodecamp.org/u/good.answer.e)\ **Post date:** [May 22, 2021, 9:06pm UTC](https://forum.freecodecamp.org/t/problem-with-the-hint-2-positive-and-negative-lookahead/449862/5 "2021-05-22T21:06:52Z")
`(?=\w*\d{2,})` hello 👋 dont understand why do we need \w at first wright and why this combination works, but not togeather ```auto //(?=\d{2})/ // filter for at list 2 numbers //(?=\w{6})/ // filter for more then 6 symbols ``` ---
**Author:** ![tryingtolearn](https://avatars.discourse-cdn.com/v4/letter/t/9de0a6/32.png) [@tryingtolearn](https://forum.freecodecamp.org/u/tryingtolearn)\ **Post date:** [July 13, 2021, 9:44am UTC](https://forum.freecodecamp.org/t/problem-with-the-hint-2-positive-and-negative-lookahead/449862/6 "2021-07-13T09:44:36Z")
I am novice too and maybe could be wrong but as far as I understand when it specifes that you have to find exact matches, like in this case, 2 consecutive digits, it means that you have exclude everything else and just look for two consecutive digits. Correct me someone if I’m wrong, please. ---
**Author:** ![ILM](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/ilm/32/363239_2.png) [@ILM](https://forum.freecodecamp.org/u/ILM)\ **Post date:** [July 13, 2021, 10:44am UTC](https://forum.freecodecamp.org/t/problem-with-the-hint-2-positive-and-negative-lookahead/449862/7 "2021-07-13T10:44:31Z")
> [@good.answer.e](#): > > dont understand why do we need \w at first wright the two lookaheads look from same position, if you don’t write `\w*` then the second lookahead is imposing that the numbers have to be at the start of the 6 characters matched by the other lookahead ---
**Author:** ![system](https://global.discourse-cdn.com/freecodecamp/original/3X/e/1/e1c433102e34b46dfaa3e15d13ab9a514b127078.svg) [@system](https://forum.freecodecamp.org/u/system)\ **Post date:** [January 11, 2022, 10:44pm UTC](https://forum.freecodecamp.org/t/problem-with-the-hint-2-positive-and-negative-lookahead/449862/8 "2022-01-11T22:44:49Z")
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