def solve():
    N,K,T=map(int,input().split())
    C=["*"]+list(input())+["*"]

    for i in range(N):
        if C[i]=="B" and (T+K)%2==i%2 and abs(K-i)<=T:
            return True
    return False

#==================================================
print("Alice" if solve() else "Bob")