#include<bits/stdc++.h>
 using namespace std;
 
 int main()
 {
 	int jack;
 	cin>>jack;
 	while(jack--)
 	{
 		int a,b;
 		cin>>a>>b;
 		vector<int>v(a);
 		vector<int>v1(b);
 		for(int i=0;i<a;i++)
 		{
 			cin>>v[i];
 		}
 		for(int i=0;i<b;i++)
 		{
 			cin>>v1[i];
 		}
 		int u=a+b;
 		vector<int>k;
 		 for(int i=0;i<a;i++)
 		{
 			 k.push_back(v[i]);
 		}
 		 		for(int i=0;i<b;i++)
 		{
 			 k.push_back(v1[i]);
 		}
 		sort(k.begin(),k.end());
 		int h=0;
 		for(int i=0;i<k.size();i++)
 		{
 			if(k[i]==k[i+1]-1 || k[i]==k[i+1])
 			h++;
 		}
 		cout<<h+1<<"\n";
 	}
 }

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1 2 7
3 6 5
2 3
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2 2 2