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

int main()
{
	int N;
	int i,count=1;
	scanf("%d\n", &N);
	char S[N+1][11];

	for (i = 0; i < N; i++) {
		scanf("%s\n", S[i]);
		//printf("%s\n", S[i]);
	}
	
	//qsort(S, N, sizeof(*S), strcmp);
	qsort(S, N, sizeof(S[0]), strcmp);

	for (i = 1; i < N; i++) {
		if(strcmp(S[i], S[i-1]) != 0)
			count += 1;
		//printf("%s\n", S[i]);
	}
	printf("%d\n", count);
}