What does this C++ snippet output?

1#include <iostream>
2 
3struct A {
4  virtual void f() { std::cout << "A\n"; }
5  void call() { this->f(); }
6};
7struct B : A {
8  void f() override { std::cout << "B\n"; }
9};
10int main() {
11    B b;
12    static_cast<A&>(b).call();
13}