Problem:
Mode Value

Your task is to write a program which reads a sequence of integers and prints mode values of the sequence.
The mode value is the element which occurs most frequently.

Input

A sequence of integers ai (1 ≤ ai ≤ 100). The number of integers is less than or equals to 100.

Output

Print the mode values. If there are several mode values, print them in ascending order.

Sample Input

5
6
3
5
8
7
5
3
9
7
3
4

Output for the Sample Input

3
5

For example, 3 and 5 respectively occur three times, 7 occurs two times, and others occur only one. So, the mode values are 3 and 5.

Solution in Ruby (judge verdict: Accepted)

class ModeValue
  def mode(array)
    result = array.each_with_object(Hash.new(0)) { |i, h| h[i] += 1 }
    max = result.values.max
    result.select { |_, v| v == max }.keys.sort
  end
end

array = STDIN.read.split("\n").map(&:to_i)
puts ModeValue.new.mode(array)