Problem:
Score : 100 points

Problem Statement

On some day in January 2018, Takaki is writing a document. The document has a column where the current date is written in yyyy/mm/dd format. For example, January 23, 2018 should be written as 2018/01/23.

After finishing the document, she noticed that she had mistakenly wrote 2017 at the beginning of the date column. Write a program that, when the string that Takaki wrote in the date column, S, is given as input, modifies the first four characters in S to 2018 and prints it.

Constraints

S is a string of length 10.

The first eight characters in S are 2017/01/.

The last two characters in S are digits and represent an integer between 1 and 31 (inclusive).

Input

Input is given from Standard Input in the following format:

S

Output

Replace the first four characters in S with 2018 and print it.

Sample Input 1

2017/01/07

Sample Output 1

2018/01/07

Sample Input 2

2017/01/31

Sample Output 2

2018/01/31

Solution in Ruby (2.3.3) (judge verdict: Wrong Answer)

n, sum = STDIN.gets.split(' ').map(&:to_i)

Otoshidama = Struct.new('Otoshidama', :x, :y, :z)

otoshidama = catch(:break_loop) do
  0.upto(n) do |x|
    0.upto(n) do |y|
      z = n - x - y
      next if z < 0

      if 10000*x + 5000*y + 1000*z == sum
        throw :break_loop, Otoshidama.new(x, y, z)
      end
    end
  end
end

if otoshidama.kind_of?(Otoshidama)
  puts "#{otoshidama.x} #{otoshidama.y} #{otoshidama.z}"
else
  puts "-1 -1 -1"
end