fn main() {
    let mut ymd = String::new();
    std::io::stdin().read_line(&mut ymd).ok();
    let ymd: Vec<i32> = ymd.split_whitespace().flat_map(str::parse).collect();

    let start = vec![1989, 1, 8];
    let end = vec![2019, 4, 30];

    if start <= ymd && ymd <= end {
        println!("Yes");
    } else {
        println!("No");
    }
}