//#include <fstream>
//#include <iostream>
//#include <climits>
//#include <string.h>
#include <bits/stdc++.h>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");

int main()
{
    bool ok=0;
    int litere=0, cuvinte=0;
    char c;
    while(fin.get(c))
    {
        if((c>='a' && c<='z') || (c>='A' && c<='Z'))
            {
                ok=1;
                litere++;
            }
        else
            if(ok==1)
                {
                    cuvinte++;
                    ok=0;
                }
    }
    fout<<litere/cuvinte;
    return 0;
}
/*
int main()
{
	bool ok=0;
	int l=0,cuv=0;
	char c;
 
    while(fin.get(c))
    {
        if((c >= 'a' && c <= 'z') || (c >= 'A' && c <=' Z'))
        {
            ok = 1;
            l++;
        }
        else 
			if(ok == 1)
			{
				cuv++;
				ok = 0;
			}
    }//end while
    fout<<l/cuv;
    return 0;
}
*/