import sys
input = sys.stdin.readline

N,K,T=map(int,input().split())
C=input().strip()

K-=1

def win(N,K,T):
    left=-1
    for i in range(K,-1,-1):
        if C[K]!=C[i]:
            left=i
            break

    right=N
    for i in range(K,N):
        if C[K]!=C[i]:
            right=i
            break

    if left!=-1:
        if 1<K-left<=T and (K-left)%2==T%2:
            if C[K]=="A":
                return "Alice"
            else:
                return "Bob"


    if right!=N:
        if 1<right-K<=T and (right-K)%2==T%2:
            if C[K]=="A":
                return "Alice"
            else:
                return "Bob"

    if right-left==2 and T%2==0:
        if C[K]!="A":
            return "Alice"
        else:
            return "Bob"

    if right-left==2:
        if right-K==T or K-left==T:
            if C[K]=="A":
                return "Alice"
            else:
                return "Bob"
            
        if right!=N:
            if win(N,right,T-1)==C[K]:
                return C[K]
        if left!=-1:
            if win(N,left,T-1)==C[K]:
                return C[K]

        

    if C[K]!="A":
        return "Alice"
    else:
        return "Bob"

print(win(N,K,T))