fn main() {
    let mut s = String::new();
    std::io::Read::read_to_string(&mut std::io::stdin(), &mut s).ok();
    let s: Vec<String> = s.split_whitespace().skip(2).flat_map(str::parse).collect();

    if s.iter().any(|s| s.contains("LOVE")) {
        println!("YES");
    } else {
        println!("NO");
    }
}