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

k -= 1  # Convert to 0-based index

min_steps = float('inf')
# Find the minimal distance to any 'B' from position k
for i in range(n):
    if c[i] == 'B':
        distance = abs(i - k)
        if distance < min_steps:
            min_steps = distance

if min_steps > t:
    print("Bob")
else:
    rem = t - min_steps
    if rem % 2 == 0:
        print("Alice")
    else:
        print("Bob")