use std::io::*;
use std::str::FromStr;

fn main() {
    let n: usize = read();
    let mut color_1 = [0; 7];
    let mut color_2 = [0; 7];
    let pastel_color: [&str; 7] = ["Red","Orange","Yellow","Green","Cyan","Blue","Violet"];
    for _i in 0..n{
        let pastel: String = read();
        if pastel == "Red"{
            color_1[0] += 1;
        }
        if pastel == "Orange"{
            color_1[1] += 1;
        }
        if pastel == "Yellow"{
            color_1[2] += 1;
        }
        if pastel == "Green"{
            color_1[3] += 1;
        }
        if pastel == "Cyan"{
            color_1[4] += 1;
        }
        if pastel == "Blue"{
            color_1[5] += 1;
        }
        if pastel == "Violet"{
            color_1[6] += 1;
        }
    }

    for _i in 0..n - 1{
        let pastel: String = read();
        if pastel == "Red"{
            color_2[0] += 1;
        }
        if pastel == "Orange"{
            color_2[1] += 1;
        }
        if pastel == "Yellow"{
            color_2[2] += 1;
        }
        if pastel == "Green"{
            color_2[3] += 1;
        }
        if pastel == "Cyan"{
            color_2[4] += 1;
        }
        if pastel == "Blue"{
            color_2[5] += 1;
        }
        if pastel == "Violet"{
            color_2[6] += 1;
        }
    }
    for _i in 0..7{
        if color_1[_i] != color_2[_i]{
            print!("{}",pastel_color[_i]);
            return;
        }
    }
}

pub fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}