import sys

sys.setrecursionlimit(200005)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n", end="\n\n")
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()
# dij = [(0, 1), (1, 0), (0, -1), (-1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
inf = 18446744073709551615
# inf = 4294967295
md = 10**9+7
# md = 998244353

trans = {"A": "1010", "B": "1011", "C": "1100", "D": "1101", "E": "1110", "F": "1111"}

s = SI()

t = ""
for c in s: t += trans[c]
t = "0"*(-len(t)%3)+t

cnt = [0]*8
for i in range(len(t)//3):
    cnt[int(t[i*3:i*3+3],2)] += 1

mx = max(cnt)
ans = []
for i in range(8):
    if cnt[i] == mx: ans.append(i)

print(*ans)