struct A {
    int a;
    int b;
};

struct B {
    int a;
    int b;
    int c;
    A d;
};

void main() {
    B b;
    b.a = 1;
    b.b = 2;
    b.c = 3;
    b.d.a = 3;
    b.d.b = 5;
    
    B* ba = &b;
    ba->d.a = 4;
    
    print b.a;
    print b.b;
    print b.c;
    print b.d.a;
    print b.d.b;
}