Nesting not working..

Question

Goodafternoon all :).

I have a question. I am trying out nesting into if-statements. Therefore I made a small code:

cout << "How old do you think that Mark is? < " << flush;

int input;
cin >> input;

if (input <= 3)
{
cout << "You are close" << endl;

if (input == 4)
{
cout << "Perfect" << endl;
}
}

else
{
cout << "Sorry, please try again" << endl;
}

when I now enter 4 the program returns: sorry please try