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#include <bits/stdc++.h>
using namespace std;
ifstream fin("restante.in");
ofstream fout("restante.out");
struct cuvant{
char s[19];
}a[36502];
int n, ct;
inline bool cmp(const cuvant x, const cuvant y)
{
return strcmp(x.s,y.s)<0;
}
int main()
{
int i;
fin>>n;
fin.get();
for(i=1; i<=n; i++)
{
fin.getline(a[i].s,sizeof(a[i].s));
sort(a[i].s,a[i].s+(int)strlen(a[i].s));
}
sort(a+1,a+n+1,cmp);
if(strcmp(a[1].s,a[2].s)!=0) ct++;
for(i=2; i<=n-1; i++)
if(strcmp(a[i].s,a[i-1].s)!=0 && strcmp(a[i].s,a[i+1].s)!=0) ct++;
if(strcmp(a[n].s,a[n-1].s)!=0) ct++;
fout<<ct<<'\n';
return 0;
}