a=[20104,20063,19892,20011,19874,20199,19898,20163,19956,19841]
gets.chars.each{|c|
  a[c.ord-48]-=1 if c>='0'
}
puts "#{(0..9).find{|i|a[i]==-1}} #{(0..9).find{|i|a[i]==1}}"