num_dict = {'A': 10, 'B': 11, 'C': 12, 'D': 13, 'E': 14, 'F': 15}
N = list(input())

n = len(N)
N.reverse()
cnt_list = [0 for _ in range(8)]
tmp = 0
for i in range(n):
    tmp += num_dict[N[i]] * pow(2, i % 3)
    q, r = divmod(tmp, 8)
    cnt_list[r] += 1
    tmp = q
    if (i + 1) % 3 == 0:
        q, r = divmod(tmp, 8)
        cnt_list[r] += 1
        tmp = q
    if i == n - 1:
        cnt_list[tmp] += 1

max_cnt = max(cnt_list)
ans = []
for i in range(8):
    if cnt_list[i] == max_cnt:
        ans.append(i)
print(*ans)