#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
typedef long long ll;
int s[105];
void solve(){
	int y1, n, y2;
	cin>>y1;
	cin>>n;
	for(int i=1; i<=n; i++)
		cin>>s[i];
	s[n+1]=10000;
	cin>>y2;
	int x=0;
	for(int i=1; i<=n; i++){
		if(y2>=s[i] && y2<=s[i+1]){
			x=i;
			break;
		}
	}
	cout<<y2-y1+1-x<<endl;
}
int main(){
	std::ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int T=1;
	cin>>T;
	while(T--)
		solve(); 
	return 0;
}