#include <bits/stdc++.h>

using namespace std;

typedef unsigned long long ull;
typedef long long ll;

int main(){
	string s, b[8];
	cin >> s;
	for(int i=0; i<8; i++) cin >> b[i];
	int cnt=0;
	for(int i=0; i<8; i++){
		for(int j=0; j<8; j++){
			if(b[i][j]!='.') cnt++;
		}
	}
	if(s=="oda"){
		if(cnt%2==0) cout << "oda" << endl;
		else cout << "yukiko" << endl;
	}else{
		if(cnt%2==0) cout << "yukiko" << endl;
		else cout << "oda" << endl;
	}
	return 0;
}