#include <fstream>
#include <string.h>

using namespace std;

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

int main()
{ char a[200];
  f.getline(a,200);
  int nr=0,lit=0;
  if(isalpha(a[0])) nr++;
  for(unsigned int i=1;i<strlen(a)-1;++i)
  {
      if(isalpha(a[i]))
        {   ++lit;
            if(!isalpha(a[i-1])) ++nr;
        }

  }
  g<<lit/nr;
  f.close();
  g.close();
    return 0;
}