#include <bits/stdc++.h>      using namespace std;      int main()   {      int t;      cin>>t;      while(t--)      {          int n,m;          int count=0;          cin>>n>>m;          map <int, int > ma;          int a[n],b[m];          for(int i=0;i<n;i++)          {              cin>>a[i];              ma[a[i]]++;          }          for(int i=0;i<m;i++)          {              cin>>b[i];              ma[b[i]]++;          }          for(auto i=ma.begin();i!=ma.end();i++)          {              if(i->second>1)              {                  count=count+2;              }          }          cout<<count/2<<  n ;      }          return 0;   }