class com:
def __init__(self):
print("A")
class b(com):
def __init__(self):
super().__init__()
print("B")
b = b()
Y2xhc3MgY29tOgogICAgZGVmIF9faW5pdF9fKHNlbGYpOgogICAgICAgIHByaW50KCJBIikKCmNsYXNzIGIoY29tKToKICAgIGRlZiBfX2luaXRfXyhzZWxmKToKICAgICAgICBzdXBlcigpLl9faW5pdF9fKCkgIAogICAgICAgIHByaW50KCJCIikKCmIgPSBiKCk=