# Join 3 filtered lists with the same starting list order

**URL:** <https://forum.dynamobim.com/t/join-3-filtered-lists-with-the-same-starting-list-order/12532>\
**Category:** Lists-Logic\
**Created:** [June 17, 2017, 9:10pm UTC](https://forum.dynamobim.com/t/join-3-filtered-lists-with-the-same-starting-list-order/12532 "2017-06-17T21:10:18Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![g.pietrolungo](https://avatars.discourse-cdn.com/v4/letter/g/bc79bd/32.png) [@g.pietrolungo](https://forum.dynamobim.com/u/g.pietrolungo)\
**Post date:** [June 17, 2017, 9:10pm UTC](https://forum.dynamobim.com/t/join-3-filtered-lists-with-the-same-starting-list-order/12532/1 "2017-06-17T21:10:18Z")

</div>

Good Night, I’ve 3 list (in red colour) previously filtered with boolen mask and I’m trying to join them into one list keeping the same starting list order (in green colour). Anyone can Help me?  
Thank you. ![](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/b/b/bb1106f1b2e1bfcaa516f7f779a941cd96058684.jpg)

---

<div class="post-metadata">

**Author:** ![g.pietrolungo](https://avatars.discourse-cdn.com/v4/letter/g/bc79bd/32.png) [@g.pietrolungo](https://forum.dynamobim.com/u/g.pietrolungo)\
**Post date:** [June 18, 2017, 7:14am UTC](https://forum.dynamobim.com/t/join-3-filtered-lists-with-the-same-starting-list-order/12532/2 "2017-06-18T07:14:50Z")

</div>

Solved with the ListMergeByBoolMask Node.