Ls = gets.chomp.split.map(&:to_i)
counts = Ls.uniq.map{|item| [item, Ls.count(item)]}.to_h

values = counts.values
if values.count(values.max) == 1
  puts counts.key(values.max)
else
  puts counts.select { |k,value| value == values.max }.keys.max
end