#define _USE_MATH_DEFINES
 
#include <iostream>
#include <iomanip>
#include <sstream>
 
#include <algorithm>
#include <cmath>
 
#include <string>
#include <queue>
#include <vector>
#include <complex>
#include <set>
#include <map>
#include <stack>
#include <list>

#include <valarray>

#include<cassert>//assert();
//#include <random>//xAOJ
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
 
#define PII pair<int,int>
/////////
typedef long long LL;
typedef long double LD;
typedef unsigned long long ULL;
/////////
using namespace::std;
/////////
/////////

void solve(){
	char S[512];
	cin >> S;
	bool flag = false;
	int ans = 0;
	int cou = 0;
	int len = 512;//strlen(S);
	for(int i=0;i<len;++i){
if( S[i] == (char)0xE2 && S[i+1] == (char)0x80 && S[i+2] == (char)0xA6){
		//0x81,0x63
		//if( S[i] == (char)0x81 && S[i+1] == (char)0x63 ){
			++cou;
			i += 2;
		}else{
			ans = max(ans,cou);
			cou = 0;
		}
	}
	cout << ans << endl;
}

int main(void){
    std::cin.tie(0); 
    std::ios::sync_with_stdio(false);
    std::cout << std::fixed;//
    //cout << setprecision(16);//
	
	solve();
	
	return 0;
}