Consider this Python code snippet implementing Observer pattern. What will be printed?

Consider this Python code snippet implementing Observer pattern. What will be printed?

class Subject:
    def __init__(self):
        self.observers = []
    def addObserver(self, observer):
        self.observers.append(observer)
    def notify(self, message):
        for obs in self.observers:
            obs.update(message)

class Observer:
    def __init__(self, name):
        self.name = name
    def update(self, message):
        print(f"{self.name} received: {message}")

s = Subject()
o1 = Observer('A')
o2 = Observer('B')
s.addObserver(o1)
s.addObserver(o2)
s.notify('Hello')