fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let (mut w, mut d, mut o) = (0, 0, 1);
	for c in s.trim().chars() {
		match c {
			'a' | 's' => w += 1,
			'l' | 'o' => d += 1,
			_ => o = 0,
		}
	}
	println!(
		"{}",
		((2u8.pow(w) - 1) * (2u8.pow(d) - 1)).saturating_sub(o)
	)
}