Sift a list of items using an output index pattern. This component functions as the inverse of the Combine component. The Sift and Combine components are the preferred tools for conditional logic in Grasshopper.

Input parameters:

1. Li → List to sift.
2. Pt → Sifting pattern to apply.

Output parameters:

1. 0 → Output for those items with sifting pattern index 0.
2. 1 → Output for those items with sifting pattern index 1.