char name[9],field[10][10];
{
  rd(name,field(8));
  field[0..7][0..7] = field[0..7][0..7] == '.';
  field[0..7][1..7] += field[0..7][0..];
  field[1..7][7] += field[0..][7];
  puts(((name[0]=='y') == (field[7][7]%2)) ? "oda" : "yukiko");
}