import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); int n = sc.nextInt(); int[][] counts = new int[2][2]; for (int i = 0; i < n; i++) { counts[sc.nextInt() % 2][sc.nextInt() % 2]++; } int ans = 0; for (int[] arr : counts) { for (int x : arr) { ans += x / 2; } } String[] names = new String[]{"Bob", "Alice"}; System.out.println(names[ans % 2]); } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); public Scanner() throws Exception { } public int nextInt() throws Exception { return Integer.parseInt(next()); } public long nextLong() throws Exception { return Long.parseLong(next()); } public double nextDouble() throws Exception { return Double.parseDouble(next()); } public String next() throws Exception { while (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }