interface Delete{
	static void delete(String str){
		
	}
}

class Period implements Delete{
	public static String delete(String str){
		return str.replaceAll("\\.","");
	}
}

public class No_88{
	public static void main(String[] args){
		java.util.Scanner sc = new java.util.Scanner(System.in);
		String first,second,str;
		first = sc.next();
		second = "";
		str = "";
		
		if(first.equals("oda")){
			second = "yukiko";
		}
		else if(first.equals("yukiko")){
			second = "oda";
		}
		
		for(int i = 0;i < 8;i++){
			str += sc.next();
		}
		
		str = Period.delete(str);
		
		if(str.length()%2 == 0){
			System.out.println(first);
		}
		else{
			System.out.println(second);
		}
	}
}