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)

# https://atcoder.jp/contests/abc085/tasks/abc085_c
# スペース区切りの整数の入力
n,y=gets.chomp.split(" ").map(&:to_i);

flag = false
for yukichi in 0..n
    for higuchi in 0..n
        noguchi = n - yukichi - higuchi
        if (yukichi * 10000 + higuchi * 5000 + noguchi * 1000 == y) && (yukichi + higuchi + noguchi == n) && noguchi >=0
            print("#{yukichi} #{higuchi} #{noguchi}")
            flag = true
        end
    end
end

if flag == false
   print("-1 -1 -1")
end