import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		for(int i = 0 ; i < s.length() ; i++) {
			if(s.charAt(i) == '?') {
				System.out.println(String.valueOf("yukicoder".charAt(i)));
			}
		}
	}
}