import std;

fn int main()
{
	$assert(@str_upper("Hello World") == "HELLO WORLD");
	$assert(@str_lower("Hello World") == "hello world");
	$assert(@str_find("Hello World", "o") == 4);
	$assert(@str_find("Hello World", "w") == -1);
	$assert(@str_hash("Hello C3") == 2193775821);
	return 0;
}