#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
long long nr1, nr2, ok;
char c;
int main()
{
    while(f.get(c))
      if(isalpha(c))
        ok=1, nr1++;
      else
          if(ok)
            nr2++,ok = 0;
  g<<nr1/nr2;

  return 0;}