#include <mm_malloc.h>
//#include <stdio.h>
//#include <string.h>
#include <cstdio>
#include <cstring>
//#include <stdlib.h>
#include <cstdlib>
#include <iostream>
using namespace std;
int sr(char *b, char **c, int j) {
    int i=0, k = 0, h=0, i1;
    j=0;
    while (b[i] != 0) {
        while (b[i] == ' ') {
            i++;
        }
        if (b[i] == 0) {
            return j;
        }
        c = (char**)realloc(c, (j + 1)*sizeof(char*));
        i1=i;
        while (b[i1] != '.' && b[i1] != ',' && b[i1] != ' ' && b[i1] !=0){
            h++;
            i1++;
        }
        c[j] = (char*)calloc((size_t) h+1, sizeof(char));
        for (k=0; k<h; k++, i++){
            c[j][k] = b[i];
        }
        j++;
        char *p1;
        char p = '.';
        p1 = strchr(&b[i+1], p);
        i = *p1 + 1;
        h = 0;
    }
    return j;
}

int main() {
	int i, j, N;
    size_t l = 0;
    char **a = 0;
	char *b = 0;
	char **c=0;
	scanf("%d", &N);
	N++;
	a = (char**)calloc(N, sizeof(char*));
	for (i = 0; i < N; i++) {
		a[i] = (char*)calloc(81, sizeof(char));
	}
	for (i = 0; i < N; i++) {
		cin.getline(a[i], 80);
	}
	for (i = 0; i < N; i++) {
		l = l + strlen(a[i]) + 1;
		b = (char*)realloc(b, (l)*sizeof(char));
		strcat(b, a[i]);
		strcat(b, " ");
	}
	i=0;
	while (b[i]==' ') {
	    i++;
	}
	b[i-1]='.';
	sr(b, c, j);
	printf("%d",j);
	return 0;

}