#include<iostream>
#include<fstream>
#include<string.h>
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;}