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

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