INF = 10 ** 18
N, K, T = map(int, input().split())
S = input()
if 'A' not in S:
    print("Bob")
if 'B' not in S:
    print("Alice")


def f(S, i):
    res = []
    lres = INF
    for l in range(i - 1, -1, -1):
        if S[l] != S[i]:
            lres = abs(l - i)
            break
    if T < lres:
        lres = INF
    rres = INF
    for r in range(i + 1, N):
        if S[r] != S[i]:
            rres = abs(r - i)
            break
    if T < rres:
        rres = INF
    return lres, rres


K -= 1
ans = 0
l, r = f(S, K)

if min(l, r) == INF:
    ans = 0
elif max(l, r) != INF and (r - l) % 2:
    ans = 1
else:
    l = min(l, r)
    if (T - l) % 2:
        ans = 0
    else:
        ans = 1

if ans ^ (S[K] == 'B'):
    print("Alice")
else:
    print("Bob")