#include <bits/stdc++.h>

using namespace std;

int main() {
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
    string a;
    getline(cin,a);
    int t = 0;
    int u = 0;
    for (int i=0;i<a.size();i++)
    {
       if (isalpha(a[i]))
       {
           while(isalpha(a[i])) {i++; t++;}
           i--;
          // t--;
            u++;
           
       }
    }
 //   cout <<t <<endl;
    cout << t/u<<endl;
    return 0;
}