import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		while(sc.hasNext()){
			String s=sc.next();
			int c=-4;
			for(int i=0;i<8;i++){
				String str=sc.next();
				for(int j=0;j<8;j++) if(str.charAt(j)!='.') c++;
			}
			if(c%2==0) System.out.println(s);
			else System.out.println(s.equals("oda") ? "yukiko" : "oda" );
		}
	}
}