#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
int main() {
    // Input
    string S;
    cin >> S;
    vector<string> B(8);
    rep(i, 8) cin >> B[i];

    // Count Stones
    int cnt = 0;
    rep(i, 8) rep(j, 8) if (B[i][j] != '.') ++cnt;

    // Output
    if (S == "oda") cout << (cnt & 1 ? "yukiko" : "oda") << endl;
    else cout << (cnt & 1 ? "oda" : "yukiko") << endl;
}