#include<stdio.h>
#include<map>
#include<string>
#include<iostream>
#include<string.h>
using namespace std;
__int64 gcd(__int64 a,__int64 b){
    
    if(b)return gcd(b,a%b);
    else return a;
}
int main(){
    
    int t;
    scanf("%d",&t);
    while(t--){
        __int64 ans = 0;
       __int64 ji,ou;
       ji = ou = 0;
       map<string,int>m;
       __int64 n;
       char a[200010];
       scanf("%I64d",&n);
       for(int i = 0;i<n;i++){
       scanf("%s",a);
       m[a] ++;
       int len = strlen(a);
       if(len % 2)ji++;
       else ou++;
       }
       map<string,int>::iterator itor;
       for(itor = m.begin();itor!=m.end();itor++){
          __int64 x = itor->second;
          if(x > 1)ans += x * (x-1)/2;
          //printf("%d\n",x);
       }
       __int64 zi,mus;
       zi = ans + ji*ou;
       mus = (n*(n-1))/2;
       __int64 gg = gcd(zi,mus);
       printf("%I64d",zi/gg);
       printf("/");
       printf("%I64d\n",mus/gg);
     }
    
    
}