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

int cmp_char(const void* a, const void* b){
//    char *a_char = (char *)a;
//    char *b_char = (char *)b;
    return strcmp(a, b);
}

int main(){

    int N;
    scanf("%d", &N);

    char S[N+1][10+1];
    int i;

    for( i = 1; i <= N; i++ ){
        scanf("%s", S[i]);
    }

    qsort( S, N, sizeof(S[N]), cmp_char );

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

    printf("%d\n", ans);

    return 0;

}

