#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include <sstream>
#include<iomanip>
#include <ctype.h>
using namespace std;

//#include<bits/stdc++.h>



int main() {
	
	string s;
	cin >> s;
	int r = 0;
	int t = 0;
//	cout << s[2];
	for (int i = 0; i < s.size(); i++) {
		if (s[i] == -30 ) {
			t++; //cout << "#";
			i += 2;
		}
		else t = 0;
		
		r = max(t, r);
	}
	cout << r << endl;
	return 0;
}