import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.NoSuchElementException;

public class TwoBamboo {

    /* メモ化用Map */
    private static int[][] calculatedArray;

    public static void main(String[] args) {
        FastScanner cin = new FastScanner(System.in);
        int d = cin.nextInt();
        int[][][] allQuestions = new int[d][2][];
        for (int i = 0; i < d; i++) {
            /* 2本の竹情報 */
            allQuestions[i][0] = new int[2];
            allQuestions[i][0][0] = cin.nextInt();
            allQuestions[i][0][1] = cin.nextInt();
            /* 要求数 */
            int requestsNum = cin.nextInt();
            /* 要求情報 */
            allQuestions[i][1] = new int[requestsNum];
            for (int j = 0; j < requestsNum; j++) {
                allQuestions[i][1][j] = cin.nextInt();
            }
        }
        cin.close();
        for (int[][] question : allQuestions) {
            System.out.println(answer(question[0], question[1]));
        }
    }

    /* 各データセット単位で解く */
    private static int answer(int[] bamboo, int[] requests) {
        Arrays.sort(requests);
        Arrays.sort(bamboo);
        calculatedArray = new int[requests.length][bamboo[0] + 1];
        return getNum(0, bamboo[0], bamboo[1], requests);
    }

    private static int getNum(int currentIndex, int shortBamboo, int longBamboo, int[] requests) {
        /* 要求されるのは長さのみで重みはないので、要求を小さい順にソートしたとき、R(n)の要求に応えずにR(n+1)の要求に応えたほうがよい、というケースはない。なので、必ず昇順ソートされた要求に対し、どちらかの竹から切リ出して次の要求を処理する */
        if (calculatedArray[currentIndex][shortBamboo] != 0) {
            /* 計算済み */
            return calculatedArray[currentIndex][shortBamboo];
        }
        int shortResult = 0;
        if (requests[currentIndex] <= shortBamboo) {
            shortResult++;
            if (currentIndex + 1 < requests.length) {
                shortResult += getNum(currentIndex + 1, shortBamboo - requests[currentIndex], longBamboo, requests);
            }
        }
        int longResult = 0;
        if (requests[currentIndex] <= longBamboo) {
            longResult++;
            if (currentIndex + 1 < requests.length) {
                longResult += getNum(currentIndex + 1, shortBamboo, longBamboo - requests[currentIndex], requests);
            }
        }
        int result = shortResult > longResult ? shortResult : longResult;
        calculatedArray[currentIndex][shortBamboo] = result;
        return result;
    }

    static class FastScanner {
        private final InputStream in;
        private final byte[] buffer = new byte[1024];
        private int ptr = 0;
        private int buflen = 0;

        public FastScanner(InputStream in) {
            this.in = in;
        }

        public void close() {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte())
                return buffer[ptr++];
            else
                return -1;
        }

        private static boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        }

        public boolean hasNext() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr]))
                ptr++;
            return hasNextByte();
        }

        public String next() {
            if (!hasNext())
                throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public long nextLong() {
            if (!hasNext())
                throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        }

        public int nextInt() {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE)
                throw new NumberFormatException();
            return (int) nl;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }
    }

}