#include <iostream>
#include<fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int k,s,ok;
char c;
int main()
{
   while(f.get(c))
   {
       if(ok==0)
        if(c>='a'&&c<='z' || c>='A'&&c<='Z')
        ok=1;
        if(ok==1)
        if(c>='a'&&c<='z' || c>='A'&&c<='Z')
        k++;
        else {s++;
        ok=0;}}
        g<<k/s;
    return 0;
}