import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        int a = S.length();
        int b = -1;
        while(true){
            String temp = "";
            for(int i=0; i<a; i++){
                temp = temp + "…" ;
            }
            b=S.indexOf(temp);
            if(b!=-1){
                break;
            }
            a--;
        }
        System.out.println(a);
    }
}