#include<bits/stdc++.h>
using namespace std;
int main(){
  string f,b[8];
  cin>>f;
  int n=0;
  for(int i=0;i<8;i++){
    cin>>b[i];
    for(int j=0;j<8;j++){
      if(b[i][j]!='.')n++;
    }
  }
  if(n%2==0){
    cout<<f<<endl;
  }else if(f=="oda"){
    cout<<"yukiko"<<endl;
  }else{
    cout<<"oda"<<endl;
  }
}