using System;

public class Program {
	// 文字の出現回数をカウントする
	public static int CountChar (string s, char c) {
		string replStr = s.Replace(c.ToString(), "");
		return s.Length - replStr.Length;
	}
	
	public static void Main () {
		const int LENGTH = 8;
		const char BLACK = 'b';
		const char WHITE = 'w';
		const string ODA = "oda";
		const string YUKIKO = "yukiko";
		
		// 先手後手を決める
		string firstPlayer = Console.ReadLine();
		string secondPlayer;
		if (firstPlayer == ODA) {
			secondPlayer = YUKIKO;
		} else {
			secondPlayer = ODA;
		}
		
		// 盤面に置いてある石の数を数える
		int count = 0;
		for (int i = 0; i < LENGTH; i++) {
			string s = Console.ReadLine();
			count += CountChar(s, BLACK);
			count += CountChar(s, WHITE);
		}
		
		if (count % 2 == 0) {
			Console.WriteLine(firstPlayer);
		} else {
			Console.WriteLine(secondPlayer);
		}
	}
}