import std.algorithm, std.array, std.range;
import std.string, std.conv;
import std.math;
import std.stdio, std.typecons;

void main()
{
  auto s = readln.chomp;
  auto b = iota(8).map!(i => readln.chomp).join;
  auto c = b.count!(c => c != '.');
  
  writeln(c % 2 == 0 ? s : rev(s));
}

string rev(string s)
{
  return s == "oda" ? "yukiko" : "oda";
}