class HouseNumbers
{  
    public static void main(String args[])
    {
	int current = 1;
	int nr = 0;
	int end = 2;
	long accHigh = 2;
	long accLow = 0;
	while(nr < 10)
	{
	    while(true)
	    {
		if(accHigh > accLow)
		{
		    break;
		}
		if(accLow == accHigh)
		{
		    String s = String.format("%d, %d", current, end);
		    System.out.println(s);
		    ++nr;
		    break;
		}
		++end;
		accHigh += end;
	    }

	    accHigh -= (current + 1 + end--);
	    accLow += current;
	    ++current;
	}
    }
}