import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        int count = 0;
        for(int i=0; i<8; i++){
            String t = sc.next();
            String [] arr = t.split("");
            for(int j=0; j<arr.length; j++){
                if( "w".equals(arr[j]) || "b".equals(arr[j]) ){
                    count++;
                }
            }
        }
        if(count%2==0){
            System.out.println(s);
        }else{
            if( "yukiko".equals(s) ){
                System.out.println("oda");
            }else{
                System.out.println("yukiko");
            }
        }
    }
}