use std::cmp::max;

fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let s: &str = s.trim();

    let mut count: usize = 0;
    let mut cmax: usize = 0;
    for c in s.split("") {
        match c {
            "…" => { count += 1; cmax = max(cmax, count); },
            _ => { count = 0; },
        }
    }
    println!("{}", cmax);
}