#include <cstdio>

int main() {
	int rows = 0;
	
	while(scanf("%d",&rows) == 1){
		getchar();
		
		char hashmap[1024] = {0};
		int counter = 0;
		
		for(int i = 0; i < rows; i++){
			int x = 0;
			while(true){
				int in = getchar();
				if(in == '\n'){
					break;
				}
				in = in - '0';

				x = 1 << (in-1) | x;
			}
			//printf("%d\n",x);
			if(hashmap[x] != 1){
				hashmap[x] = 1;
				counter++;
			}
		}

		printf("%d\n",counter);
	}


	return 0;
}