#include<bits/stdc++.h>
using namespace std;
void solve() {
int n;
cin>>n;
vector<string> arr(n);
for(int i=0;i<n;i++) cin>>arr[i];
unordered_set<char> s;
unordered_map<string,int> m;
for(int i=0;i<n;i++) {
s.clear();
for(int j=0;j<arr[i].length();j++) s.insert(arr[i][j]);
string str;
for(auto it:s) str+=it;
sort(str.begin(),str.end());
m[str]++;
}
cout<<m.size()<<endl;
return ;
}
int main() {
/*int n=0;
cin>>n;
while(n--) {
solve();
}*/
solve();
return 0;
}
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