Order of static blocks, instance blocks and constructors

A static block runs once when the class is first used. A plain { ... } block in the class body (an instance block) runs for every new object. What does this print?

class Base {
    static { System.out.print("1 "); }
    { System.out.print("2 "); }
    Base() { System.out.print("3 "); }
}
class Child extends Base {
    static { System.out.print("4 "); }
    { System.out.print("5 "); }
    Child() { System.out.print("6 "); }
}
// in main:
new Child();
System.out.println();
new Child();