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: Runtime Error)

# 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);

yukichi = 0
higuchi = 0
noguchi = 0


while yukichi <= n
    yukichizangaku =  y - yukichi * 10000
    if yukichizangaku == 0
        flag = true
        break
    end
    while higuchi <= n - yukichi
        higuchizangaku = yukichizangaku - higuchi * 5000
        if higuchizangaku == 0
            flag = true
            break
        end
        while noguchi <= n - yukichi - higuchi
            noguchizangaku = higuchizangaku - noguchi * 1000
            if noguchizangaku == 0
                flag = true
                break
            end
            noguchi += 1
        end

        if flag
            break
        end
        noguchi = 0
        higuchi += 1
    end
    if flag
        break
    end
    higuchi = 0
    yukichi += 1
end

if flag
    print("#{yukichi} #{higuchi} #{noguchi}\n")
else
    print("-1 -1 -1\n")
end