#include <iostream>
#include <vector>
#include <algorithm>
#include <math.h>
#include <map>

#define ALL(x) (x).begin(),(x).end()
#define RALL(x) (x).rbegin(),(x).rend()
#define REP(i,a,n) for(int i = (a);i < (n);i++)
#define PI 3.14159265359
#define MOD 1000000007

using namespace std;

int main(){
    string s,test = "…";
    cin >> s;
    int ans = 0,count = 0;
    for(int i = 0;i < s.length();i+=3){
        string a{s[i],s[i+1],s[i+2]};
        if(a == test)count++;
        else count = 0;
        ans = max(ans,count);
    }
    cout << ans << endl;
    return 0;
}