fn main() {
    let mut xx = String::new();
    std::io::Read::read_to_string(&mut std::io::stdin(), &mut xx).ok();
    let xx: Vec<u64> = xx.split_whitespace().skip(1).flat_map(str::parse).collect();

    let mut pieces = [(2, 8), (3, 9), (7, 9)];

    for mv in xx.chunks(4) {
        let before = (mv[0], mv[1]);
        let after = (mv[2], mv[3]);
        (0..3).for_each(|i| {
            if pieces[i] == before {
                pieces[i] = after;
            }
        });
    }

    if pieces == [(5, 8), (4, 8), (6, 8)] {
        println!("YES");
    } else {
        println!("NO");
    }
}