#include <cstdlib>
#include <cctype>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <vector>
#include <string>
#include <iostream>
#include <sstream>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <fstream>
#include <numeric>
#include <iomanip>
#include <bitset>
#include <list>
#include <stdexcept>
#include <functional>
#include <utility>
#include <ctime>
using namespace std;

int main(int argc, const char * argv[])
{
    string input;
    cin >> input;
    std::size_t found = 0;
    std::size_t tmp_found = 0;
    int count = 0;
    int max_count = 0;
    while ((found = input.find("…",found))!=std::string::npos) {
        if (tmp_found+3 == found) count++;
        else count = 1;
        max_count = max(max_count,count);
        tmp_found = found++;
    }
    
    cout << max_count << endl;
    return 0;
}