#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

ifstream in("text.in");
ofstream out("text.out");

const int NMAX = 1e6 + 1e3;

int n;
int lenc, nrc;
int res;
char s[NMAX];

int main()
{
  in.getline(s, NMAX);
  n = strlen(s);

  for(int i = 0; i < n; i++) {
    if(isalpha(s[i])) {
      nrc++;
      while(isalpha(s[i])) {
        lenc++;
        i++;
      }
    }
  }

  res = lenc / nrc;
  out << res << '\n';

  in.close();
  out.close();
  return 0;
}