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

signed main(){
  string name[ 2 ]; cin >> name[ 0 ];
  name[ 1 ] = name[ 0 ] == "oda" ? "yukiko" : "oda";
  vector< string > G( 8 );
  for( int i = 0; i < 8; ++i )
    cin >> G[ i ];
  int cnt = 0;
  for( int i = 0; i < 8; ++i )
    for( int j = 0; j < 8; ++j )
      cnt += G[ i ][ j ] != '.';
  cout << name[ cnt & 1 ] << endl;
  return 0;
}