#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define all(a) begin(a),end(a)
#define sz(a) (int)(a).size()
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;
bool f(int N,int K,int T,string S){
	if(S[K]=='B'){
		rep(i,0,N)S[i]='A'+'B'-S[i];
		return !f(N,K,T,S);
	}
	int l=K,r=K;
	while(l>=0&&S[l]=='A')l--;
	while(r<N&&S[r]=='A')r++;
	if(r-l==2&&T%2==0)return false;
	if(r-l==2&&T%2==1){
		if(K&&f(N,K-1,T-1,S))return true;
		if(K+1<N&&f(N,K+1,T-1,S))return true;
		return false;
	}
	if(l>=0&&K-l<=T&&(T+K+l)%2==0)return true;
	if(r<N&&r-K<=T&&(T+K+r)%2==0)return true;
	return false;
}
int main(){
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(cin.failbit);
	int N,K,T;cin>>N>>K>>T;K--;
	string S;cin>>S;
	if(f(N,K,T,S))cout<<"Alice"<<endl;
	else cout<<"Bob"<<endl;
}