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#include <bits/stdc++.h>
using namespace std;
ifstream fin("restante.in");
ofstream fout("restante.out");
const int NMAX = 36005;
string a[NMAX];
int main()
{
int n;
fin >> n;
for(int i=1;i<=n;i++)
{
fin >> a[i];
sort(a[i].begin(),a[i].end());
}
sort(a+1,a+n+1);
int k=0;
for(int i=1;i<=n-1;i++)
{
if(a[i]!=a[i+1])
{
k++;
}
}
fout << k;
fout << '\n';
for(int i=1;i<=n;i++) fout << a[i] << '\n';
return 0;
}