{-# htermination (psPs :: (List a)  ->  (List a)  ->  (List a)) #-} 
import qualified Prelude 
data MyBool = MyTrue | MyFalse 
data List a = Cons a (List a) | Nil 
psPs :: (List a)  ->  (List a)  ->  (List a);
psPs Nil ys = ys;
psPs (Cons x xs) ys = Cons x (psPs xs ys);