#include<bits/stdc++.h>
using namespace std;
int main(){
int t;
cin>>t;
while(t--)
{
for (int i = 0; i < t; i++)
{int n,m,count=0;
cin>>n>>m;
int a[n], b[m];
for(int i=0;i<n;i++)
{
cin>>a[i];
}
for(int i=0;i<m;i++)
{
cin>>b[i];
}
sort(a,a+n);
sort(b,b+m);
int k=0;
while(i<n && k<m)
{
if(a[i]==b[k])
{
count++;
i++;
}
else if(a[i]<b[k])
i++;
else
k++;
}
cout<<count<<endl;
}
}
}
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