from collections import Counter as cnt

ten = int(input(),16)
eight = []
st = ''.join(format(ten,'o'))
for i in range(len(st)):
    eight.append(st[i])

count = cnt(eight)
max_value = []
max_cnt = max(count.values())
for i in count:
    if max_cnt == count[i]:
        max_value.append(i)
print(*sorted(max_value))