typedef a = ()();
typedef b = int();
typedef c = int(int x);
typedef d = int(
    int x,
    int y,
);
typedef e = (a^)(b^);
typedef f = (a^, int r)(int x);
typedef g = (
    a^,
    b^,
    c^,
)(a^, b^, c^);

typedef h = a^(b^ x);
typedef i = ((int r, int s), (int, int))((int x, int));

typedef j = (int r)(int y)^ (int x);