import sys
from collections import Counter
input = lambda: sys.stdin.readline().rstrip()

##################

n = int(input(), 16)
c = Counter(list(str(oct(n)[2:])))
mx = max(c.values())
for k,v in sorted(c.items(), key=lambda x: -x[1]):
  if v == mx:
    print(k, end=' ')
print(end='\n')