use std::io::Read;

fn main() {
    let mut stdin = String::new();
    std::io::stdin().read_to_string(&mut stdin).unwrap();
    let mut stdin = stdin.split_whitespace().map(|x| x.parse::<i64>().unwrap() );
    let mut get = || stdin.next().unwrap();
    
    let n = get();
    let mut counts = vec![0; 4];
    for _ in 0..n {
        let x = get();
        let y = get();
        let i = (y % 2) * 2 + x % 2;
        counts[i as usize] += 1;
    }
    let mut count = 0;
    for c in &counts {
        count += c / 2;
    }
    let ans = if count % 2 == 0 { "Bob" } else { "Alice" };
    println!("{}", ans);
}