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#include <bits/stdc++.h>
using namespace std;
ifstream fin("restante.in");
ofstream fout("restante.out");
int n, ct, vf[35000][30];
char s[25];
int identice(int x, int y)
{
if(vf[x][0]!=vf[y][0])
return 0;
for(int i=1; i<='z'-'a'+1; i++)
if(vf[x][i]!=vf[y][i])
return 0;
return 1;
}
int main()
{
int i, j, l;
bool ok;
fin>>n;
fin.get();
for(i=1; i<=n; i++)
{
fin.getline(s,sizeof(s));
l=strlen(s)-1;
vf[i][0]=l;
for(j=0; j<=l; j++)
vf[i][s[j]-'a'+1]++;
}
for(i=1; i<=n; i++)
{
ok=0;
for(j=1; j<=n; j++)
if(i!=j)
if(identice(i,j))
{
ok=1;
break;
}
if(!ok) ct++;
}
fout<<ct<<'\n';
return 0;
}