#include <iostream>
#include <algorithm>
using namespace std;
int main()
{
ios_base::sync_with_stdio(false);
int n,m;
cin>>n;
for(int i=0;i<n;i++){
cin>>m;
string * tab = new string[m];
for(int e=0;e<m;e++){
string s;
cin>>s;
sort(s.begin(),s.end());
tab[e] = s;
}
int maxi=0,x=0;
for(int e=0;e<m;e++){
for(int r = 0;r<m;r++){
if(tab[e] == tab[r]) x++;
if(x> maxi) maxi = x;
}
x = 0;
}
cout<<maxi<<endl;
delete [] tab;
}
return 0;
}
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