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#include<fstream>
#include<algorithm>
#include<string>
using namespace std;
int n,i,j,rs,m,c[20];
string s,a[36005];
int main()
{
ifstream cin("restante.in");
ofstream cout("restante.out");
cin>>n; getline(cin,s);
for(i=1;i<=n;i++)
{
getline(cin,s);
m=s.length();
for(j=0;j<=m;j++)
c[j]=(int)s[j];
sort(c,c+m);
for(j=0;j<=m;j++)
s[j]=(char)c[j];
a[i]=s;
}
sort(a+1,a+n+1);
m=1;
for(i=2;i<=n;i++)
if(a[i]==a[i-1]) ++m;
else { if(m==1) ++rs; m=1; }
if(m==1) ++rs;
cout<<rs<<'\n';
return 0;
}