#include <iostream>
#include <set>

using namespace std;

int main() {
int traineeCount;
    while(cin>>traineeCount)
    {

        //cin>>traineeCount;
       /* if(cin.eof())
        {
            break;
        }*/
        string flush;
        getline(cin,flush);
        set<string> sset;

        for(int i=0;i<traineeCount;i++)
        {
            string input;
            getline(cin,input);
            int numbers[10];
            for(int i=0;i<10;i++)
            {
                numbers[i]=0;
            }

            for(int i=0;i<(int)input.length();i++)
            {
                char c=input[i];
                numbers[c-'0']++;
            }

            string cleaned;
            for(int i=0;i<10;i++)
            {
                if(numbers[i]>0)
                {
                    cleaned+=i; //?
                }
            }
            sset.insert(cleaned);

        }

        cout<<sset.size()<<endl;
    }


    return 0;
}