#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>
//#include<bits/stdc++.h>


using namespace std;



int main(){
	string n;
	cin>>n;
	string a[10]={};
	for(int i=0;i<8;i++)
		cin>>a[i];
	int r=0;
	for(int i=0;i<8;i++)
		for(int j=0;j<8;j++)
			if(a[i][j]=='w'||a[i][j]=='b')r++;

	if(r%2==0)cout<<n;
	
	else{
		if(n=="yukiko")n="oda";
		else n="yukiko";
		cout<<n;
	}
	cout<<endl;
	return 0;
}