#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000001

bool win(string s,int T,int K){
	int N = s.size();
	bool f = false;
	{
		int c = K;
		while(c!=N){
			c++;
			if(c==N)break;
			if(s[c]!=s[K]){
				int diff = abs(c-K);
				if(diff<=T){
					if((T-diff)%2==0)f = true;
				}
				break;
			}
		}
	}
	{
		int c = K;
		while(c!=-1){
			c--;
			if(c==-1)break;
			if(s[c]!=s[K]){
				int diff = abs(c-K);
				if(diff<=T){
					if((T-diff)%2==0)f = true;
				}
				break;
			}
		}
	}
	return f;
}

int main(){
	
	int N,K,T;
	cin>>N>>K>>T;
	
	K--;
	string s;
	cin>>s;
	if(s==string(N,'A')){
		cout<<"Bob"<<endl;
		return 0;
	}
	if(s==string(N,'B')){
		cout<<"Alice"<<endl;
		return 0;
	}
	
	if((K+1==N||s[K+1]!=s[K]) && (K-1==-1||s[K-1]!=s[K])){
		if(T%2==0){
			if(s[K]=='B')cout<<"Alice"<<endl;
			else cout<<"Bob"<<endl;
			return 0;
		}
		if((K==0||win(s,T-1,K-1)) && (K==N-1||win(s,T-1,K+1))){
			if(s[K]=='B')cout<<"Alice"<<endl;
			else cout<<"Bob"<<endl;
		}
		else{
			if(s[K]=='A')cout<<"Alice"<<endl;
			else cout<<"Bob"<<endl;
		}
	}
	else{
		bool f = win(s,T,K);
		if(f){
			if(s[K]=='A')cout<<"Alice"<<endl;
			else cout<<"Bob"<<endl;
		}
		else{
			if(s[K]=='B')cout<<"Alice"<<endl;
			else cout<<"Bob"<<endl;
		}
	}
	
	return 0;
}