use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let mut a: Vec<_> = s
		.lines()
		.enumerate()
		.map(|s| {
			let n: Vec<u8> = s.1.split(' ').flat_map(str::parse).collect();
			(200 - n[0], n[1], b'A' + s.0 as u8)
		})
		.collect();
	a.sort();
	a.iter().for_each(|(_, _, c)| println!("{}", *c as char));
}