# include <bits/stdc++.h>
using namespace std;
string s[40005];
int main(void)
{
    int n,ans=0;
    ifstream fi("restante.in");
    fi>>n;
    for (int i=1;i<=n;++i) fi>>s[i],sort(s[i].begin(),s[i].end());
    sort(s+1,s+1+n);
    for (int i=1,j;i<=n;i=j)
    {
        for (j=i+1;j<=n && s[i] == s[j];++j);
        ans+=(i+1==j);
    }
    ofstream fo("restante.out");
    return fo << ans << '\n',0;
}