fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: i64 = n.trim().parse().unwrap();
    let mut result: Vec<usize> = vec!{0, 0, 0, 0};
    for _ in 0..n {
        let mut xy = String::new();
        std::io::stdin().read_line(&mut xy).ok();
        let xy: Vec<i64> = xy.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
        result[(xy[0]%2*2+xy[1]%2) as usize] += 1;
    }
    if result.iter().map(|v| v / 2).sum::<usize>() % 2 == 0 {
        println!("Bob");
    } else {
        println!("Alice");
    }
}