fn a(a: u64, b: u64) -> bool {
		a % b == 0
	}

	let a = move |b: u64| year % b == 0;

	a(year, 80000) || !a(year, 3200) && a(year, 400) || !a(year, 100) && a(year, 4)

	a(4) ^ a(100) ^ a(400) ^ a(3200) ^ a(80000)