#include<bits/stdc++.h>
using namespace std;

int main(){
    vector<string> a={"oda","yukiko"};
    string s,t;
    cin>>t;
    if(t!=a[0])swap(a[0],a[1]);
    for(int i=0;i<8;i++){
        cin>>t;
        s+=t;
    }
    cout<<(count(s.begin(),s.end(),'.')%2?a[1]:a[0])<<endl;
}