#include <bits/stdc++.h>
using namespace std;
int main() {
   string S;
   cin>>S;
   S=S+"P";
   int an=0,k=0;
   for(int i=0;i<S.size();i++){
    if(S[i]==-30&&S[i+1]==-128&&S[i+2]==-90)k++,i+=2;
    else an=max(an,k),k=0;
   }cout<<an<<endl;
}