import java.math.*;
import java.util.*;


public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String sen = sc.next();
		char[][] ban = new char[8][8];
		for(int i=0;i<8;i++){
			String temp=sc.next();
			ban[i]=temp.toCharArray();
		}
		int count=0;
		for(int i=0;i<8;i++){
			for(int j=0;j<8;j++){
				if(ban[i][j]!='.') count++;
			}
		}
		if(count%2==0){
			System.out.println(sen);
		}else{
			if(sen.equals("oda")){
				System.out.println("yukiko");
			}else{
				System.out.println("odas");
			}
		}
	}
}