import sys
input = sys.stdin.readline

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

K-=1


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

right=-1
for i in range(K,N):
    if C[K]!=C[i]:
        right=i
        break

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


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

if C[K]!="A":
    print("Alice")
else:
    print("Bob")