#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
int INF = 1e9;
int MOD = 1e9+7;
main(){
    int c = 0xe280a6;
    string s;
    cin >> s;
    int cnt = 0,maxc = 0;
    for(int i = 0;i < s.length()-2;i++){
        if(s[i] == 0xe2 && s[i+1] == 0x80 && s[i+2]){
            cnt++;
            maxc = max(maxc,cnt);
        }else cnt = 0; 
    }
    cout << maxc << endl;
}