#include<stdio.h>
#include<iostream>
#include<map>
#include<string>
#include<cstring>
#include<algorithm>
using namespace std;
int sol,p,n,i,m;
char s[100];
map<string,int> M;
int main()
{
    freopen("restante.in","r",stdin);
    freopen("restante.out","w",stdout);
    scanf("%d ",&n);
    for(i=1;i<=n;i++)
    {
        gets(s); 
        m=strlen(s);
        sort(s,s+m);
        M[(string)s]++;
        p=M[s];
        if(p==1)
            sol++;
        else if(p==2)
            sol--;

    }
    printf("%d",sol);
    return 0;
}