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: Runtime Error)

package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

var scanner = bufio.NewScanner(os.Stdin)
var writer = bufio.NewWriter(os.Stdout)

func readLine() string {
	scanner.Scan()
	return scanner.Text()
}

func main() {
	input := strings.Split(readLine(), " ")
	n, _ := strconv.Atoi(input[0])
	y, _ := strconv.Atoi(input[1])
	result := map[string]int{
		"x": -1,
		"y": -1,
		"z": -1,
	}

	for i := 0; i < n; i++ {
		for j := 0; j < (n - i); j++ {
			if (i*10000 + j*5000 + (n-i-j)*1000) == y {
				result["x"] = i
				result["y"] = j
				result["z"] = (n - i - j) * 1000
				break
			}
		}
	}

	fmt.Fprintf(writer, "%d %d %d", result["x"], result["y"], result["z"])
	writer.Flush()
}