package sample;

import java.util.Scanner;

public class Sample2 {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        String blackPlayer = sc.next();
        int discsCount = 0;

        for (int i = 0; i < 8; i++) {

            String row = sc.next();

            for (int j = 0; j < 8; j++) {

                if (row.charAt(j) != '.') {
                    discsCount++;
                }

            }

        }

        if (blackPlayer.equals("oda")) {

            if (discsCount % 2 == 0) {
                System.out.println("oda");
            } else {
                System.out.println("yukiko");
            }

        } else if (blackPlayer.equals("yukiko")) {

            if (discsCount % 2 == 0) {
                System.out.println("yukiko");
            } else {
                System.out.println("oda");
            }

        }

    }

}