#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>

FILE *in = fopen ("text.in","r"), *out = fopen("text.out","w");

int litera(char c)
{
    if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
        return 1;

    return 0;
}

int main()
{
    int nrlitere = 0, nrcuv = 0;
    char prev = ' ';

    char c;
    while (fscanf(in, "%c", &c) == 1)
    {
        if (litera(c))
        {
            ++nrlitere;
            if (!litera(prev))
                ++nrcuv;
        }
        prev = c;
    }

    fprintf(out, "%d\n", nrlitere / nrcuv);

   return 0;
}