The winter has passed and Clara is no longer worried about hiding her leaves under trees, but she is now obsessed with putting them in order. In this problem Clara starts in a world shown in Figure 1. Your task is to help Clara to put leaves in a straight line as shown in Figure 2. Remember to only use permitted commands and don’t put leaves on top of one another. Clara should stop once she encounters a tree in front of her. One of the challenges in this exercise will be to write your code so that you don't forget to put the last leaf (just ahead of the tree). It is not really visible in Figure 2, but there is a leaf underneath Clara at her final position.