#yuki1729
import collections
n=input()
x=oct(int(n,16))
cnt=collections.Counter(x[2:])
ma=0
for k,v in cnt.items():
 if v>ma:
  ma=v
res=[]
for k,v in cnt.items():
 if v==ma:
  res.append(int(k))
res.sort()
print(*res)