#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return true; } return false; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return true; } return false; }
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define mp make_pair
#define si(x) int(x.size())
const int mod=998244353,MAX=300005,INF=1<<30;

int main(){
    
    std::ifstream in("text.txt");
    std::cin.rdbuf(in.rdbuf());
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    ll N,K,T;cin>>N>>K>>T;
    string S;cin>>S;
    K--;
    int L=INF,R=INF;
    for(int i=K-(T&1);i>=0;i-=2){
        if(S[i]!=S[K]&&abs(i-K)<=T){
            L=i;
            break;
        }
    }
    for(int i=K+(T&1);i<N;i+=2){
        if(S[i]!=S[K]&&abs(i-K)<=T){
            R=i;
            break;
        }
    }
    if(L!=INF){
        bool f=true;
        for(int i=L+1;i<K;i++) f&=(S[i]==S[K]);
        if(f&&(K-L)<=T){
            if(K-L>=2||K-L==T){
                if(S[K]=='A') cout<<"Alice\n";
                else cout<<"Bob\n";
                return 0;
            }
            if(K+1<N&&S[K]==S[K+1]){
                if(S[K]=='A') cout<<"Alice\n";
                else cout<<"Bob\n";
                return 0;
            }
        }else{
            L=INF;
        }
    }
    if(R!=INF){
        bool f=true;
        for(int i=K+1;i<R;i++) f&=(S[i]==S[K]);
        if(f&&(R-K)<=T){
            if(R-K>=2||R-K==T){
                if(S[K]=='A') cout<<"Alice\n";
                else cout<<"Bob\n";
                return 0;
            }
            if(K&&S[K]==S[K-1]){
                if(S[K]=='A') cout<<"Alice\n";
                else cout<<"Bob\n";
                return 0;
            }
        }else{
            R=INF;
        }
    }
    if(L!=INF&&R==INF){
        assert(K==N-1);
        int cn=0;
        for(int j=K-1;j>=0;j--){
            if(S[j]!=S[K]) cn++;
            else break;
        }
        if(cn%2==0&&cn+1!=N&&cn+1<=T){
            if(S[K]=='A') cout<<"Bob\n";
            else cout<<"Alice\n";
        }else{
            if(S[K]=='A') cout<<"Alice\n";
            else cout<<"Bob\n";
        }
        return 0;
    }
    if(L==INF&&R!=INF){
        assert(K==0);
        int cn=0;
        for(int j=K+1;j<N;j++){
            if(S[j]!=S[K]) cn++;
            else break;
        }
        if(cn%2==0&&cn+1!=N&&cn+1<=T){
            if(S[K]=='A') cout<<"Bob\n";
            else cout<<"Alice\n";
        }else{
            if(S[K]=='A') cout<<"Alice\n";
            else cout<<"Bob\n";
        }
        return 0;
    }
    if(L!=INF&&R!=INF){
        int ok=0;
        {
            int cn=0;
            for(int j=K-1;j>=0;j--){
                if(S[j]!=S[K]) cn++;
                else break;
            }
            if(cn%2==0&&cn+1!=K+1&&cn+1<=T){
                ok++;
            }
        }
        {
            int cn=0;
            for(int j=K+1;j<N;j++){
                if(S[j]!=S[K]) cn++;
                else break;
            }
            if(cn%2==0&&cn+1!=N-K&&cn+1<=T){
                ok++;
            }
        }
        if(ok==2){
            if(S[K]=='A') cout<<"Bob\n";
            else cout<<"Alice\n";
        }else{
            if(S[K]=='A') cout<<"Alice\n";
            else cout<<"Bob\n";
        }
    }else{
        if(S[K]=='B') cout<<"Alice\n";
        else cout<<"Bob\n";
    }
    
}