KöMaL 2019 K629

Seven ducklings are walking towards the lake in a single file: Loppy, Happy, Tappy, Kippy, Boppy, Poppy, and Sippy. They normally walk in the same order every day, but this time they lined up in reverse order. Regarding the present order, the following information is available: The ducklings preceding Loppy could line up in six different ways in a single file. The number of ducklings preceding Boppy is the half of those following him. The number of ducklings between Poppy and Tappy is one fewer than twice the number of those between Sippy and Happy. Happy and Tappy both walk behind Kippy. What is the normal order of the ducklings walking to the lake?