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

min_i = max(1, K - T)
max_i = min(N, K + T)
parity = T % 2

found_b = False
for i in range(min_i, max_i + 1):
    if (i - K) % 2 == parity:
        if c[i-1] == 'B':
            found_b = True
            break

print("Alice" if found_b else "Bob")