fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let mut n = 0;
	let mut a = 0;
	s.chars().for_each(|c| {
		match c {
			'…' => n += 1,
			_ => n = 0,
		};
		if a < n {
			a = n;
		}
	});
	println!("{}", a);
}