#include <cstdio>
#include <algorithm>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <climits>
#include <string>
#include <map>
#ifdef _WIN32
#define llsb "%I64d"
#else
#define llsb "%lld"
#endif
using namespace std;
const int MAXL=310000,maxn=21000;
typedef long long LL;
string s[maxn];
char buf[MAXL];
typedef map<string,int>::iterator SI;

LL gcd(LL a,LL b){return b?gcd(b,a%b):a;}
void dit(){
    int n,oddc=0,evenc=0;map<string,int> S;
    scanf("%d",&n);
    for(int i=0;i<n;++i){
        scanf("%s",buf);
        s[i]=string(buf);
        (s[i].size()&1)?++oddc:++evenc;
        ++S[s[i]];
    }
    LL wins=0;
    for(int i=0;i<n;++i){
        wins+=(s[i].size()&1)?evenc:oddc;
        int cc=S[s[i]]-1; wins+=cc;
    }
    LL sum=LL(n)*(n-1),g=gcd(wins,sum);
    printf(llsb "/" llsb "\n",wins/g,sum/g);
    for(int i=0;i<n;++i)s[i]="";
}
int main() {
    int T;scanf("%d",&T);while(T--)dit();
}