#include <iostream>
#include <string>
#include <set>

void set_bit(unsigned int& num,int bit)
{
	num |= 1<<bit;
}


int main()
{

	int n;

	while (std::cin >> n){
		std::set<unsigned int> actual;
		for (int i = 0; i < n; i++){
			std::string line;
			std::cin >> line;
			// Nacitaj cifry
			unsigned int num=0;
			for ( unsigned int j=0; j<line.size(); j++)
			{
				char c = line[j] - '0';
				set_bit(num , (int)c);
			}
//			std::cout << num << std::endl;
			actual.insert(num);
		}
		std::cout << actual.size() << std::endl;
	}
}