import java.util.*;

public class Run {
    public static void main (String arg[]) {
        Scanner scan = new Scanner(System.in);
        String S = scan.next();
        int sum = 4;
        String B;
        for (byte i = 0; i < 8; i++) {
            B = scan.next();
            for (byte j = 0; j < 8; j++) {
                if (B.charAt(j)!='.') sum++;
            }
        }
        String ans;
        if (sum%2==0) ans = S;
        else {
            if (S.equals("oda")) ans = "yukiko";
            else ans = "oda";
        }

        System.out.println(ans);
    }
}