#include <iostream>
#include <vector>

using namespace std;
using ll = long long;

int main() {
    // int n = 50;
    // vector<bool> dp(n); // first player win or loss? 1 is win 0 is loss
    // dp[0] = 0;
    // for (int i = 0; i < n; i++) {
    //     if (i > 0) dp[i] = dp[i] || !dp[i-1];
    //     if (i > 1) dp[i] = dp[i] || !dp[i-2];
    // }
    // for (int i = 0; i < n; i++) {
    //     cout << i << ' ' << dp[i] << endl;
    // }
    vector<bool> win = {0, 1, 1, 0, 1, 1};
    ll cnt = 0;
    ll su = 0;
    string s; cin >> s;
    int n = s.length();
    for (int i = 1; i <= n; i++) {
        cnt += (s[n-i] == '1');
        su += i*(s[n-i] == '1');
    }
    // cout << "CNT: " << cnt << endl;
    // cout << "SUM: " << su << endl;
    ll x = cnt*(cnt+1)/2;
    su -= x;
    cout << (win[su%6] ? "Alice" : "Bob");
}