#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

void out(){cout<<endl;} template<typename Head,typename... Tail> void out(Head&& head,Tail&&... tail){cout<<head;out(forward<Tail>(tail)...);}

template<typename S,typename T,typename U>void flagfunc1(S flag,T A,U B){flag?cout<<A<<'\n':cout<<B<<'\n';}

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  string s,t;
  cin>>s;
  int cnt=0;
  rep(i,8){
    cin>>t;
    rep(j,8){
      if(t[j]!='.')cnt++;
    }
  }
  if(cnt%2==0){
    out(s);
  }else{
    flagfunc1(s[0]=='o',"yukiko","oda");
  }
}