#include<bits/stdc++.h>usingnamespacestd;ifstreamf("restante.in");ofstreamg("restante.out");constintnMax=36003;stringcuv[nMax];map<string,int>Mp;intmain(){intn;f>>n;for(inti=1;i<=n;i++){f>>cuv[i];}for(inti=1;i<=n;i++){sort(cuv[i].begin(),cuv[i].end());}for(inti=1;i<=n;i++){Mp[cuv[i]]++;}intans=0;for(inti=1;i<=n;i++){if(Mp[cuv[i]]==1){ans++;}}g<<ans;return0;}