s=gets.chomp.to_i(16).to_s(8)
hs={}
0.upto(7){|i|
	hs[i.to_s]=0
}
s.each_char{|e|
	hs[e]+=1
}
m1=hs.values.max
puts hs.select{|k,v| v==m1}.keys.sort.join(" ")