#include <iostream>
#include <string>
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)

int dp[61][100001];

int main(void){
	int d; cin >> d;
	while(d){
		int n1, n2; cin >> n1 >> n2;
		int sum = n1 + n2; 
		int max_n = max(n1, n2);
		int m; cin >> m;

		vector<int> a(m + 1);
		a[0] = 0;
		rep(i, m) cin >> a[i + 1];
		sort(a.begin(), a.end());

		vector<int> s(m + 1);
		s[0] = 0;
		rep(i, m) s[i + 1] += s[i] + a[i + 1];

		//rep(i, m + 1) printf("%d %d\n", a[i], s[i]);

		//初期化
		//memset(dp, -1, sizeof(dp));
		rep(i, 61)rep(j, 100001) dp[i][j] = -1;
		dp[0][n1] = 0;

		for (int i = 0; i <= m; ++i){
			for (int j = 0; j <= n1 ; ++j){
				//n1から切り出す
				if(j - a[i + 1] >= 0 && dp[i][j] != -1){
					dp[i + 1][j - a[i + 1]] = dp[i][j] + 1;
					//printf("dp[%d][%d] = %d\n", i + 1, j - a[i + 1], dp[i + 1][j - a[i + 1]]);

				}
				//n2から切り出す
				if(sum - j - s[i] >= a[i + 1] && dp[i][j] != -1){
					dp[i + 1][j] = dp[i][j] + 1;
					//printf("dp[%d][%d] = %d\n", i + 1, j, dp[i + 1][j]);
				}
			}
		}
		int ans = -2;
		rep(i, 61) rep(j, 100001) ans = max(ans, dp[i][j]);
		printf("%d\n", ans);
		d--;
	}

}