#include <bits/stdc++.h>
#define rep(i,a,n) for(int i=a;i<n;i++)
#define repb(i,a,b) for(int i=a;i>=b;i--)
#define all(a) a.begin(),a.end()
#define o(a) cout<<a<<endl
#define int long long
#define fi first
#define se second
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pii;

signed main(){
	string s;
	int b=0,w=0;
	cin>>s;
	rep(i,0,8){
		rep(j,0,8){
			char c;
			cin>>c;
			if(c=='b') b++;
			else if(c=='w') w++; 
		}
	}
	if(((b+w)%2 && s=="oda")||((b+w)%2==0 && s=="yukiko")){
		cout<<"yukiko"<<endl;
	}else{
		cout<<"oda"<<endl;
	}
}