#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;
 
int main() 
{
	int t;
	cin>>t;
	for(int k = 0; k < t; ++k ){
		int n,num;
		cin>>n>>num;
		vector<int> a(n), b(n);
		for(int i = 0; i < n; ++i){
			cin>>a[i];
		}
		for(int i = 0; i < n; ++i){
			cin>>b[i];
		}
		sort( b.begin(), b.end());
		vector<bool> mark(n, false);
		for(int  i = 0; i < n; ++i){
			for(int  j = 0; j < n; ++j){
				if( mark[j] == false && a[i]+b[j]>=num){
					mark[j] = true;
					break;
				}
			}
		}
		string ans = "YES";
		for(int  i = 0; i < n; ++i){
			if( mark[i] == false){
				ans = "NO";
				break;
			}
		}
		cout<<ans<<endl;
	}
	// your code goes here
	return 0;
}