#include <bits/stdc++.h>
using namespace std;map <string,int> M;int main(){ifstream fin("restante.in");ofstream fout("restante.out");int N,i,ans;fin>>N;string x;ans=0;for(i=1;i<=N;i++){fin>>x;sort(x.begin(),x.end());if(!M[x])ans++;else if(M[x]==1)ans--;M[x]++;}fout<<ans;return 0;}