import java.util.*;

public class Yukicoder_88{
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		String S = stdIn.next();
		int count = 0;
		for(int i=0;i<8;i++){
			String B = stdIn.next();
			for(int j=0;j<8;j++){
				if(B.charAt(j) != '.'){
					count++;
				}
			}

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