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)

hist = {}
while line = gets do
  n = line.to_i
  if hist.include? n
    hist[n] += 1
  else
    hist[n] = 1
  end
end
hist = hist.sort{|(k1, v1), (k2, v2)| v2 <=> v1}
keys = []
0.step(hist.length - 2) do |i|
  keys.push hist.to_a[i][0]
  break if hist.to_a[i][1] != hist.to_a[i + 1][1]
end
keys.sort!
keys.each do |i|
  puts i
end