namespace;
include rt;
fn main() {
	let tail = rt.cons(1, 2);
	let left = rt.cons(tail, 3);
	let right = rt.cons(tail, 4);
	rt.put_n(rt.car(rt.car(left))); rt.put_c(32);
	rt.put_n(rt.car(left) == rt.car(right)); rt.put_c(10);
}