#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("oda");}else{puts("yukiko");}
#define MAX_N 200005

int main() {
    string s;
    cin >> s;
    int flag = 0;
    if(s[0] == 'y')flag++;

    rep(i,8){
        string t;
        cin >> t;
        rep(j,8){
            if(t[j] != '.')flag++;
        }
    }

    if(flag % 2 == 0)yn;

    return 0;
}