int main() {

	while (1)
	{
		String<char> mystr;
		char c;
		bool stop_after_n = false;

			c = getchar();
			mystr.add_symbol(c);
			if (c == '\n')
				break;


		try {
			cout << mystr.find_first_of('?') << endl;
		}
		catch (NoCharacter ex) {
			cout << "no such character. Check your data and try again." << endl;
		}
	}
}