Need help with Simplifying list with double locus

[ROHIT_B_ANANDAN (Neo8910)]

How can i simplify this list so that i can get all the sub lists under a single locus .ie. all the list starts with “0”. ( {0:x} ).? Thanks!

[gurkan_bozkurt]

Trim tree?

[martinsiegrist]

Use the Split Tree component with a mask {0;*}