#include <iostream>
#include <stdio.h>
#define MAX 20000004

using namespace std;

FILE *fin = fopen("text.in", "r");
FILE *fout = fopen("text.out", "w");
char t[20000004];

int main() {
    fread(t, 1, MAX, fin);
    long i = 0;
    bool c = false;
    int ln = 0;
    int tot = 0;
    int am = 0;
    while(t[i] != '\0') {
        if((t[i] >= 'a' && t[i] <= 'z') || (t[i] >= 'A' && t[i] <= 'Z')) {
            tot++;
            c = true;
        } else {
            if(c)
                am++;
            c = false;
        }
        i++;
    }
    fprintf(fout, "%d", tot/am);
}