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 Go (1.6) (judge verdict: Wrong Answer)

package main

import (
    "fmt"
    "os"
)

func main() {

    var N, Y int
    fmt.Fscanf(os.Stdin, "%d %d", &N, &Y)

    for a := 0; a <= N; a++ {
        for b := 0; b <= N; b++ {
            if a+b > N {
                break
            }
            remain := Y - a*10000 - b*5000
            if remain < 0 {
                break
            }
            c := remain / 1000
            if a+b+c != N {
                continue
            }
            fmt.Printf("%d %d %d\n", a, b, c)
            return
        }
    }
    fmt.Printf("-1 -1 -1\n")
}