I,R,P,E=input,range,print,exit
N,K,T=map(int,I().split())
K-=1
c=I()
a="A"
b="B"
A="Alice"
B="Bob"
if c[K]>a:a,b,A,B=b,a,B,A
for i in R(K,N):
	if c[i]==a:r=i
	else:break
for i in R(K,-1,-1):
	if c[i]==a:l=i
	else:break
if l<r:
	if r-K<=T and (T-r+K)%2:P(A),E(0)
	if K-l<=T and (T-K+l)%2:P(A),E(0)
	P(B),E(0)
if T%2:
	l=r=K
	for i in R(K+1,N):
		if c[i]==b:r=i
		else:break
	for i in R(K-1,-1,-1):
		if c[i]==b:l=i
		else:break
	if K<r and(r-K>T or (T-r+K)%2<1):P(A),E(0)
	if l<K and(K-l>T or (T-K+l)%2<1):P(A),E(0)
P(B),E(0)