#include <iostream>
#include <string.h>
#include <fstream>
using namespace std;

int main()
{
    ifstream in("text.in");
    ofstream out("text.out");
    int c=0, d, l=0, n=0, i=1, ok=0;
    char s;

    while(s!='\n')
    {
        in.get(s);
        if(s>='a' && s<='z' || s>='A' && s<='Z')
        {
            l++;
            ok++;
        }
        else
        {
            if(ok!=0)
                c++;
            ok=0;
        }

    }
    out<<l/c;
    return 0;
}