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#include <fstream>
#include <algorithm>
#include <cstring>
using namespace std;
ifstream f ("restante.in");
ofstream g ("restante.out");
int n, i, j, lg, rez, poz[36000];
char a[36000][20], s[20];
bool cmp (int x, int y)
{
if (strcmp(a[x], a[y]) < 0)
return true;
return false;
}
int main()
{
f >> n;
f.get();
for (i=1; i<=n; i++)
{
f.getline(s, sizeof(s));
lg = strlen(s), sort(s, s+lg);
strcpy(a[i], s);
}
for (i=1; i<=n; i++)
poz[i] = i;
sort(poz+1, poz+n+1, cmp);
for (i=1; i<n; i++)
{
if (strcmp(a[poz[i]], a[poz[i+1]]) != 0)
rez ++;
}
g << rez;
return 0;
}