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

ifstream fin("text.in");
ofstream fout("text.out");
int ok,l,cuv;
char c;
int main()
{

    while(fin.get(c))
    {
        if((c >= 'a' && c <= 'z') || (c >= 'A' && c <='Z'))
        {
            ok = 1;
            l++;
        }
        else if(ok == 1)
        {
            cuv++;
            ok = 0;
        }
    }
    if(cuv == 0)
        fout<<0;
    else
        fout<<l/cuv;
    return 0;
}