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 Rust (1.42.0) (judge verdict: Accepted)

#![allow(unused_imports)]
use std::io::{stdin, stdout, Read, Write};

fn main() {
    let mut buf = [b'\n'; 11];
    let stdin = stdin();
    let mut handle = stdin.lock();
    handle.read(&mut buf).unwrap();
    buf[0] = b'2';
    buf[1] = b'0';
    buf[2] = b'1';
    buf[3] = b'8';
    stdout().write(&buf).unwrap();
}