#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main() {
	cin.tie(0); ios::sync_with_stdio(false);
	int ans = 0, temp_ans = 0;
	int len = 0;
	string str;
	cin >> str;
	len = str.length();
	for (int i = 0; i < len - 2; ) {
		if (str[i] == -30 && str[i + 1] == -128 && str[i + 2]) {
			temp_ans++;
			i += 3;
			int pos = 0, next_pos = 0;
		}
		else {
			ans = max(ans, temp_ans);
			temp_ans = 0;
			i++;
		}
	}
	ans = max(ans, temp_ans);	
	cout << ans << endl;
	return 0;
}