#![allow(non_snake_case)]

use std::io::{ self, prelude::* };

macro_rules! pick {
    ($tokens:expr) => {
        $tokens.next().unwrap().parse().expect("parse error")
    }
}

fn main() {
    let mut s = String::new();
    io::stdin().read_to_string(&mut s).expect("i/o error");
    let mut tokens = s.split_whitespace();

    let N: usize = pick!(tokens);

    let mut cnt = [0; 4];
    for _ in 0..N {
        let x: u64 = pick!(tokens);
        let y: u64 = pick!(tokens);
        match (x&1, y&1) {
            (0, 0) => { cnt[0] += 1; }
            (0, 1) => { cnt[1] += 1; }
            (1, 0) => { cnt[2] += 1; }
            (1, 1) => { cnt[3] += 1; }
            (_, _) => unreachable!(),
        }
    }

    let s = cnt.iter()
        .fold(0, |sum,c| sum + c/2);
    let ans = if s&1 == 1 {
        "Alice"
    }
    else {
        "Bob"
    };

    println!("{}", ans);
}