import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String answer = "";
        for(int i = 0; i < line.length(); i++) {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        }
        System.out.println(answer);
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String answer = "";
        for(int i = 0; i < line.length(); i++) {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        }
        System.out.println(answer);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String answer = "";
        for(int i = 0; i < line.length(); i++) {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        }
        System.out.println(answer);
    } main {
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String answer = "";
        for(int i = 0; i < line.length(); i++) {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        }
        System.out.println(answer);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String line = sc.nextLine(); line sc.nextLine() sc.nextLine sc String answer = ""; answer "" for(int i = 0; i < line.length(); i++) {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        } int i = 0; int i = 0; i 0 i < line.length() i line.length() line.length line i++ i++ i {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        } {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        } if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            } i == 3 i 3 {
                answer += '8';
            } answer += '8' answer '8' {
                answer += line.charAt(i);
            } answer += line.charAt(i) answer line.charAt(i) line.charAt line i System.out.println(answer) System.out.println System.out System System.out answer String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String answer = "";
        for(int i = 0; i < line.length(); i++) {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        }
        System.out.println(answer);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String answer = "";
        for(int i = 0; i < line.length(); i++) {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        }
        System.out.println(answer);
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String answer = "";
        for(int i = 0; i < line.length(); i++) {
            if(i == 3) {
                answer += '8';
            } else {
                answer += line.charAt(i);
            }
        }
        System.out.println(answer);
    }
}