#include <iostream>
#include <fstream>

using namespace std;
typedef unsigned int uint;

int main()
{
    ifstream fin("text.in");
    ofstream fout("text.out");
    char c;
    bool cn=true;
    uint ln=0;
    uint nrcuv=0;
    while(fin>>c)
    {
      if((c>='A' && c<='z') || (c>='a' && c<='z'))
      {
          ln++;
          if(cn==true){
           nrcuv++;
           cn=false;}
      }
      else
      {
          cn=true;
      }
    fout<<ln/nrcuv;
    fin.close();
    fout.close();
    }
    return 0;
}