#include<iostream>
#include<algorithm>
#include<cassert>
using namespace std;
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int N,K,T;
	cin>>N>>K>>T;
	string C;cin>>C;
	K--;
	bool win=false;
	for(int t=0;t<2;t++)
	{
		int l=K;
		while(l>=0&&C[K]==C[l])l--;
		if(l>=0&&(K-l)%2==T%2&&K-l<=T)win=true;
		reverse(C.begin(),C.end());
		K=N-1-K;
	}
	cout<<(win^C[K]=='A'?"Bob":"Alice")<<endl;
}