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)

key = {}
while n = gets
  n = n.to_i
  unless key[n]
    key[n] = 0
  end
  key[n] += 1
end

max = 0
ans = []
key.each{|k, v|
  if max < v
    ans = [k]
    max = v
  elsif max == v
    ans << k
  end
}

ans.sort.each{|i|
  puts i
}