#include <iostream>
#include <string>
#include <map>
#include <vector>

using namespace std;

int main(void){
	string s1,s2;
	cin >> s1;
	if(s1 == "oda")s2 = "yukiko";
	else s2 = "oda";
	vector<string> vs(8);
	for(int i=0;i<8;i++){
		cin >> vs[i];
	}

	int cnt = 0;
	for(int i=0;i<8;i++){
		for(int j=0;j<8;j++){
			if(vs[i][j] != '.')cnt++;
		}
	}
	cnt -= 4;
	if(cnt % 2 == 0){
		cout << s1 << endl;
	}else{
		cout << s2 << endl;
	}
	return 0;
}