N,K,T = map(int,input().split())
C = input()
K -= 1
dic = {"A":"Alice","B":"Bob"}
now = C[K]
other = ["A","B"][now == "A"]
INF = 10 ** 10
R = L = INF

def cnt(start,dir,col):
    k = 0
    flag = 0
    ret = INF
    while 0 <= start + dir * (k + 1) < N:
        if C[start + dir * (k + 1)] != col:
            flag = 1
            ret = k
            break
        k += 1
    return ret

def out(x):
    print(dic[x])
    exit()

R = cnt(K,1,now)
L = cnt(K,-1,now)

if T <= L and T <= R:
    out(other)
if 0 < L < INF:
    if (L-T) % 2 == 1:
        out(now)
if 0 < R < INF:
    if (R-T) % 2 == 1:
        out(now)
# case, R == 0 or L == 0
if T % 2 == 1:
    if R == 0:
        R2 = cnt(K+1,1,other)
        if R2 % 2 == 0:
            out(now)
    if L == 0:
        L2 = cnt(K-1,-1,other)
        if L2 % 2 == 0:
            out(now)

out(other)
N,K,T = map(int,input().split())
C = input()
K -= 1
dic = {"A":"Alice","B":"Bob"}
now = C[K]
other = ["A","B"][now == "A"]
INF = 10 ** 10
R = L = INF

def cnt(start,dir,col):
    k = 0
    flag = 0
    ret = INF
    while 0 <= start + dir * (k + 1) < N:
        if C[start + dir * (k + 1)] != col:
            flag = 1
            ret = k
            break
        k += 1
    return ret

def out(x):
    print(dic[x])
    exit()

R = cnt(K,1,now)
L = cnt(K,-1,now)

if T <= L and T <= R:
    out(other)
if 0 < L < INF:
    if (L-T) % 2 == 1:
        out(now)
if 0 < R < INF:
    if (R-T) % 2 == 1:
        out(now)
# case, R == 0 or L == 0
if T % 2 == 1:
    if R == 0:
        R2 = cnt(K+1,1,other)
        if R2 % 2 == 0:
            out(now)
    if L == 0:
        L2 = cnt(K-1,-1,other)
        if L2 % 2 == 0:
            out(now)

out(other)