#include "bits/stdc++.h" using namespace std; using Graph = vector>; typedef long long ll; typedef pair P; #define rep(i,n) for (ll i = 0; i < (n); ++i) #define all(x) (x).begin(), (x).end() #define rall(x) (x).rbegin(), (x).rend() const long long mod = 1e9 + 7; ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; } ll lcm(ll a, ll b) { return a / gcd(a, b) * b; } int main() { string s; cin >> s; vector board(8); rep(i, 8) { cin >> board[i]; } ll cnt=0; rep(i, 8) { rep(j, 8) { if(board[i][j]=='.')cnt++; } } if (s == "oda") { if (cnt % 2 == 0) { cout << "oda" << endl; } else { cout << "yukiko" << endl; } } else { if (cnt % 2 == 0) { cout << "yukiko" << endl; } else { cout << "oda" << endl; } } }