use std::io::Read;

fn main() {
    let mut all_data = String::new();
    std::io::stdin().read_to_string(&mut all_data).ok();
    let all_data: Vec<&str> = all_data.trim().split('\n').map(|s| s.trim()).collect();
    let n: usize = all_data.iter().next().unwrap().split_whitespace().next().unwrap().parse().unwrap();
    let yes_fallin_love: bool = all_data.iter().skip(1).take(n)
        .any(|s| s.contains("LOVE"));
    if yes_fallin_love {
        println!("YES");
    } else {
        println!("NO");
    }
}