Two Two And Silence

#include <iostream>
#include <memory>

struct Node {
    std::shared_ptr<Node> next;
    std::shared_ptr<Node> prev;
    ~Node() { std::cout << "~"; }
};

int main() {
    auto a = std::make_shared<Node>();
    auto b = std::make_shared<Node>();
    a->next = b;
    b->prev = a;

    std::cout << a.use_count() << b.use_count();  // (1)

    a.reset();
    b.reset();
    std::cout << "|end";
}

What is the exact output?