#include <stdio.h>
#include <ctype.h>
using namespace std;

char ch;
int lung, cuvinte, i;

int is_letter (char x)
{
    if (tolower (x) >= 'a' && tolower (x) <= 'z')
        return 1;
    return 0;
}

int main ()
{
    FILE *f = fopen ("text.in","r");
    FILE *g = fopen ("text.out","w");

    while (fscanf (f,"%c", &ch) != EOF)
    {
        if (is_letter (ch))
        {
            lung ++;
            if (!i)
                cuvinte ++;
            i = 1;

        }
        else
            i = 0;
    }

    //printf ("%d", cuvinte);
    fprintf (g, "%d\n", lung / cuvinte);

    fclose (g);
    fclose (f);
    return 0;
}