N = input()
B = []
for n in N:
    B.append(bin(int(n, 16))[2:])
B = "".join(B)
cnt = [0 for _ in range(8)]
for i in range(len(B)-1, -1, -3):
    if i-2<0:
        o = int(B[0:i-2+3], 2)
    else:
        o = int(B[i-2:i-2+3], 2)
    cnt[o] += 1
ans = []
maxcnt = -1
for i in range(8):
    if maxcnt<cnt[i]:
        ans = [i]
        maxcnt = cnt[i]
    elif maxcnt==cnt[i]:
        ans.append(i)
print(*ans)