import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
String time=sc.next();
Date a=new Date();
a.Set(time);
a.print();
}
}
class Date{
private String year,month,day;
public void Set(String time){
String s[]=time.split("-");
this.year=s[0];
this.month=s[1];
this.day=s[2];
}
public void print(){
System.out.print(year+":"+month+":"+day);
}
}
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