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

    let mut max = 0;
    let mut now = 0;
    for c in s.chars() {
        if c == '…' {
            now += 1;
        } else if now > 0 {
            max = max.max(now);
            now = 0;
        }
    }

    println!("{max}");
}