Shorten a list by removing items according to a specified culling method.

Input parameters:

1. Li → List to shrink.
2. Tn → Number of items after shrinking.
3. Me → Item removal method.
   • 0 → Retain Leading
   • 1 → Retain Trailing
   • 2 → Retain Extreme
   • 3 → Retain Inner
   • 4 → Interpolate

Output parameters:

1. Li → Shrunk list containing fewer items.