import java.util.Scanner;

public class main {
    public static void main(String[] args){
        Scanner sc= new Scanner(System.in);
        String S = sc.next();
        char[] chars = S.toCharArray();
        int lengths =S.length();
        int i=0;
        int count=0;
        int oldcount=0;

        for(;i<lengths;i++){
            if(chars[i]=='…'){
                count++;
            }else{
                count=0;
            }
            if(oldcount<count){
                oldcount=count;
            }

        }
        System.out.println(oldcount);
    }
}