public class Lights
{
  public static void main(String args[])
  {
    int n = 50;
    boolean lights[] = new boolean[n];
  
    for(int i = 1; i <= n; i++)
    {
      int j = 0;
      while(j < n)
      {
        lights[j] = !lights[j];
        j += i;
      }
    }
    for(int i = 0; i < n; i++)
    {
      if(lights[i])
        System.out.print("*");
      else
        System.out.print('o');
    }
  }
}