Up and Down the Stairs

This program climbs a staircase with a recursive function: a function that calls itself for the next step. When the calls finish, the program comes back down the same way. Its lines are mixed up: put them back in an order that prints exactly the output below. Each line keeps its indentation, so you only choose the order.

Example

In the right order, the program prints:

Start
Up to step 1
Up to step 2
Up to step 3
Reached the top
Back down from step 3
Back down from step 2
Back down from step 1
Finished