What will be the output of the following C++ code?

#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
template<class T, class U = char>
class A
{
	T a;
	U b;
    public:
	A(T a_val, char b_val = '$'){
		this->a = a_val;
		this->b = b_val;
	}
	void print(){
		cout<<a<<' '<<b<<endl;
	}
};
 
int main(int argc, char const *argv[])
{
	A <int, int> a1(5,10);
	A <int> a2(5);
	A <float> a3(10.0);
	a1.print();
	a2.print();
	a3.print();
	return 0;
}