use proconio::input;

fn main() {
	input! {
		n: usize,
		a: [([usize; 4], String); n],
	}

    let mut x = [true; 10];

    for (arr, s) in a {
        match s.as_str() {
            "NO" => {
                for i in arr {
                    x[i] = false;
                }
            },
            "YES" => {
                for i in 0..10 {
                    if !arr.contains(&i) {
                        x[i] = false;
                    }

                }
            },
            _ => unreachable!(),
        }
    }

    for i in 0..10 {
        if x[i] {
            println!("{i}");
        }
    }

    unreachable!();
}