#include <bits/stdc++.h>
using namespace std;

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

char x;
int nrlitere, nrcuv;
bool estecuv;
int main()
{
    while (in)
    {
      in.get(x);
      if (isalpha(x))
      {
          ++nrlitere;
          estecuv = 1;
      }
      else if (estecuv == 1)
      {
          ++nrcuv;
          estecuv = 0;
      }
    }
    if (nrcuv == 0) nrcuv = 1;
    out<<nrlitere / nrcuv;
    return 0;
}