#include <iostream>
#include <map>
#include <string>
#include <cstdio>
using namespace std;
int Testnum;
int  n;
int maxnum;
string   s;
map<string, int>m;
int   num[10000];
void read_data()
{
    maxnum=1;
    memset(num,  0, sizeof(num));
    int  index=0;
    m.clear();
    for (int i=1; i<=n; i++)
    {
          cin>>s;
          if(m.find(s)!=m.end())
          {
              num[m[s]]++;
              if(num[m[s]] > maxnum) maxnum = num[m[s]];
          }
          else
          {
              m[s] = index++;
              num[m[s]] = 1;
          }
    }
}

int main()
{
    //freopen("c://in.txt","r",stdin);
    cin>>Testnum;
    while(cin>>n)
    {
        read_data();
        printf("%d\n", maxnum);
    }
    return 0;
}