fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let mut n: Vec<_> = s.trim().chars().collect();
	n.sort();
	println!(
		"{}",
		if n.iter().collect::<String>() == "09eeikknooprty" {
			"Yes"
		} else {
			"No"
		}
	);
}