#include <iostream>
#include <string>
using namespace std;

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

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

    return 0;
}