#include <iostream>
#include <set>
#include <vector>

using namespace std;

vector< set<int> > data;


void Process(set<int> & personalData){

    
    if( data.size() == 0){
        data.push_back(personalData);
        return;
    }
    
    
	for(size_t i = 0; i < data.size(); i++){
		if(data[i] == personalData) return;
	}
    
    data.push_back(personalData);
    return ;

}

void readInput(){
    int  num;
    while (cin >> num) {
	//num times read lines
	for(int j = 0; j < num; j++){
		//create set
		set<int> newSet;
		//fill in the set
		string temp;
		cin >> temp;
		for(auto & c : temp){
			newSet.insert(c-'0');
		}
		//process new set
		Process(newSet);
	}
        cout << data.size() << endl;
        data.clear();
    }
}

int main(){
	readInput();
	return 0;
}