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#include<fstream>
#include<string>
#include<algorithm>
using namespace std;
ifstream fi("restante.in");
ofstream fo("restante.out");
const int max_n = 36004;
const int max_l = 21;
string s[max_n];
int i,n,nr;
int main(){
fi>>n;
for(i=1;i<=n;i++)
{
fi>>(s[i]);
sort(s[i].begin(),s[i].end());
}
sort(s+1,s+n+1);
if(n==1) nr=1;
else{
if(s[1]!=s[2]) nr++;
if(s[n-1]!=s[n]) nr++;
}
for(i=2;i<n;i++)
if(s[i-1]!=s[i] && s[i]!=s[i+1]) nr++;
fo<<nr;
fi.close();
fo.close();
return 0;
}