import sys
input = lambda: sys.stdin.readline().rstrip()
from collections import defaultdict as dd

N=input()
cnt=dd(int)
b=""

for a in N:
    b+=str(format(int(a,16),'b'))

n=len(b)
i=0
while i<n:
    num=int(b[max(n-i-3,0):n-i],2)
    cnt[num]+=1
    i+=3

ans=[]
maxval=0
for i in range(1,8):
    if maxval==cnt[i]:
        ans.append(i)
    elif maxval<=cnt[i]:
        ans.clear()
        ans.append(i)
        maxval=cnt[i]

print(*ans)