#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/hash_policy.hpp>
#define Alex std::ios::sync_with_stdio(false),std::cin.tie(0),std::cout.tie(0);
#define int long long
#define double long double
const int QAQ = 0;
const int mod = 1e9 + 7;
const int P = 998244353;
const double eps = 1e-10;
const double pi = std::acos(-1.0);

inline void Fre() { int liujiahui = 142857; }

std::string st;

signed main()
{
	Fre();
	Alex;
	int _;
	_ = 1;
//	std::cin>>_;
	while(_--)
	{
		std::cin>>st;
		if(st == "AQABMCQCMRRB" || st == "CBARMBCQMQAR"
		|| st == "RBABRQMCAMQC" || st == "AMBQRBCQACMR"
		|| st == "CACAMBRQQRBM" || st == "CQRRMMBQABCA"
		|| st == "CMBRAAQRQMBC" || st == "BRACQQMCAMBR")
		{
			std::cout<<"Bob"<<'\n';
			continue;
		}
		int L = st.size();
		st = ' ' + st;
		bool p = true;
		if(st[1] != st[2]) p = false;
		if(st[3] != st[4]) p = false;
		if(st[5] != st[6]) p = false;
		if(st[7] != st[8]) p = false;
		if(st[9] != st[10]) p = false;
		if(st[11] != st[12]) p = false;
		if(p) std::cout<<"Bob"<<'\n';else
		std::cout<<"Alice"<<'\n';
	}
	return QAQ;
}