#define _USE_MATH_DEFINES
#include <iostream>
#include <iomanip>
#include <map>
#include <stack>
#include <vector>
#include <string>
#include <cmath>
using namespace std;
const int MOD = 1e9 + 7;

int main(){
    string name;
    cin >> name;

    int cnt = -4;
    char c;
    for(int i = 0; i < 8; i++){
        for(int j = 0; j < 8; j++){
            cin >> c;
            if(c != '.')cnt++;
        }
    }

    if(cnt % 2 == 0)cout << name << endl;
    else{
        if(name == "oda")cout << "yukiko" << endl;
        else cout << "oda" << endl;
    }
}