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

}

void readInput(){
	int num;
	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);
	}
}

int main(){
	readInput();
	cout << data.size();
	return 0;
}