n,k,t = map(int,input().split())
c = input()

# 片方しかない
if 'A' not in c:
	print("Alice")
	exit()

if 'B' not in c:
	print("Bob")
	exit()

# 長さ偶数に到達させてはならない

rl = []
moji = ""
cnt = 0
for i in range(n):
	if moji != c[i]:
		if cnt > 0:
			rl.append((moji,cnt))
		cnt = 1
		moji = c[i]
	else:
		cnt += 1
if cnt > 0:
	rl.append((moji, cnt))

m = len(rl)
v = 0
ind = -1
indi = -1
for i in range(m):
	v += rl[i][1]
	if v >= k:
		v -= rl[i][1]
		indi = i
		ind = k-v-1
		break

mindist = 10 ** 9
if indi >= 1:
	mindist = min(mindist, ind + 1)
if indi < m-1:
	mindist = min(mindist, rl[indi][1] - ind)

# 到達不能！
if mindist > t:
	if rl[indi][0] == "A":
		print("Bob")
	else:
		print("Alice")
	exit()

if indi >= 1:
	# 左側でしめれる
	if ind + 1 <= t and (t-(ind+1)) % 2 == 0:
		if rl[indi][0] == "A":
			print("Alice")
		else:
			print("Bob")
		exit()
if indi < m-1:
	# 右側でしめれる
	if rl[indi][1] - ind <= t and (t-(rl[indi][1] - ind)) % 2 == 0:
		if rl[indi][0] == "A":
			print("Alice")
		else:
			print("Bob")
		exit()

# 無理
if rl[indi][0] == "A":
	print("Bob")
else:
	print("Alice")

exit()