#include <iostream>
#include <fstream>
#include <string>

using namespace std;

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

int main()
{
    //char s,p='0';
    int cl=0,cv=0;
    /*while(f>>noskipws>>s)
    {
        if(isalpha(s)) cl++;
        else
            if(isalpha(p)) cv++;
        p=s;
    }
    g<<cl/cv;
    */
    string a;
    getline(f,a);
    for(string::iterator i=a.begin();i<=a.end();++i)
    {
        if(isalpha(*i)) cl++;
        else
            if(isalpha(*(i-1))) cv++;
    }
    g<<cl/cv;
    return 0;
}