#include <bits/stdc++.h>
using namespace std;

int n;
char a[10005];
unsigned long long hasha[10005];
int ans = 1;

unsigned long long h(char k[]){
	int l = strlen(k);
	unsigned long long sum = 0;
	for(int i = 0; i < l; ++i) sum = ((unsigned long long)k[i] + 1711) * 54581 % 1315423911;
	return sum;
}

int main(){
	//freopen("P3370_1.in","r",stdin);
	//freopen("P3370_1.out","w",stdout);
	scanf("%d",&n);
	for(int i = 0; i < n; ++i){
		scanf("%s",a);
		hasha[i] = h(a);
	}
	sort(hasha + 1,hasha + n + 1);
	for(int i = 1; i < n; i++){
		if(hasha[i] != hasha[i + 1]) ans ++;
	}
	printf("%d\n",ans);
	//fclose(stdin);
	//fclose(stdout);
	return 0;
}