import java.util.Scanner;
class N088{
	public static void main(String args[]){
		Scanner s = new Scanner(System.in);
		String a = s.next();
		String b = a.equals("oda") ? "yukiko" : "oda";
		int count = 0;
		for(int i = 0; i < 8; i++){
			String c = s.next();
			for(int j = 0; j < 8; j++){
				if(c.charAt(j) != '.'){
					count++;
				}
			}
		}
		if(count % 2 == 0){
			System.out.println(a);
		}else{
			System.out.println(b);
		}
	}
}