
int main()
{
	int n, i = 1, a[5] = {-1,-1,-1,-1,-1}, m = 0;
	scanf("%d", &n);
    while (i < n)
	{
		a[m] = (int)((n%(i*10))/i);
		i *= 10;
		m++;
	}
	for (i=0;i<5;i++)
	{
		if (a[i] != -1)
			printf("%d", a[i]);
	}
	return 0;
}
