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Cod sursa(job #163972)
#include <stdio.h>
#include <string.h>
#include <algorithm>
using namespace std;
int n,l,nro=0;
char c[20];
long long v[36010];
void scan()
{
freopen("restante.in", "r",stdin);
freopen("restante.out", "w",stdout);
scanf("%d", &n);
for(int i=1;i<=n;++i)
{
scanf("%s", &c);
l=strlen(c);
sort(c,c+l);
for(int j=0;j<l;++j)
v[i]=v[i]*10+(c[j]-'a'+1);
}
sort(v+1,v+n+1);
}
void solve()
{
for(int i=2;i<=n;++i)
if(v[i]!=v[i-1])
++nro;
//for(int i=1;i<=n;++i)
// printf("%d\n", v[i]);
//
//printf("\n");
}
void print()
{ printf("%d\n", nro);}
int main()
{
scan();
solve();
print();
return 0;
}