You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
# A simple Tree class 
class Tree(object): 
    def __init__(self, data): 
        self.data = data  # root node 
        self.children = []  # empty list to store the children 
  
# Function to print the tree pre-order 
def traverse(tree): 
    print(tree.data) 
  
    # recursively traverse the Tree
    for value in tree.children: 
        traverse(value) 
  
# Create Tree 
tree = Tree('A') 
tree.children.append(Tree('B')) 
tree.children.append(Tree('C')) 
tree.children[0].children.append(Tree('D')) 
tree.children[0].children.append(Tree('E')) 

# Traverse the Tree 
traverse(tree)
user
A
B
D
E
C
assistant