#include <iostream>
using namespace std;
int main(){
    string s;cin>>s;
    int ans = 0;
    int nw = 0;
    for(int i = 0; s.size() > i; i++){
        
        if(s[i] == -30 && s[i+1] == -128 && s[i+2] == -90){
            nw++;
            i+=2;
        }else{
            ans = max(ans,nw);
            nw = 0;
        }
    }
    cout << max(ans,nw) << endl;
}