#include<bits/stdc++.h>

using namespace std;

#define sc(a) scanf("%d",&a)
#define scs(a) scanf(" %s",a)


typedef long long ll;

const int MAX = 1e3 + 11;

char in[MAX];
set<int> s;

int main()
{
    int n;
    sc(n);

    for(int i=0;i<n;++i)
    {
        scs(in);
        int l = strlen(in);
        int cur = 0;
        for(int j=0;j<l;++j)
            cur = cur | (1<<(in[j]-'a'));
        s.insert(cur);
    }

    cout<<s.size();

    return 0;
}