import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int nw = sc.nextInt();
        int[] wArr = new int[nw];
        for (int i = 0; i < nw; i++) {
            wArr[i] = sc.nextInt();
        }
        int nb = sc.nextInt();
        int[] bArr = new int[nb];
        for (int i = 0; i < nb; i++) {
            bArr[i] = sc.nextInt();
        }
        Arrays.sort(wArr);
        Arrays.sort(bArr);
        int wIdx = nw - 1;
        int bIdx = nb - 1;
        int wCount = 0;
        int prev = Integer.MAX_VALUE;
        while (true) {
            if (wCount % 2 == 0) {
                if (wIdx < 0) {
                    break;
                }
                if (wArr[wIdx] < prev) {
                    wCount++;
                    prev = wArr[wIdx];
                    wIdx--;
                } else {
                    wIdx--;
                }
            } else {
                if (bIdx < 0) {
                    break;
                }
                if (bArr[bIdx] < prev) {
                    wCount++;
                    prev = bArr[bIdx];
                    bIdx--;
                } else {
                    bIdx--;
                }
            }
        }
        wIdx = nw - 1;
        bIdx = nb - 1;
        int bCount = 0;
        prev = Integer.MAX_VALUE;
        while (true) {
            if (bCount % 2 == 1) {
                if (wIdx < 0) {
                    break;
                }
                if (wArr[wIdx] < prev) {
                    bCount++;
                    prev = wArr[wIdx];
                    wIdx--;
                } else {
                    wIdx--;
                }
            } else {
                if (bIdx < 0) {
                    break;
                }
                if (bArr[bIdx] < prev) {
                    bCount++;
                    prev = bArr[bIdx];
                    bIdx--;
                } else {
                    bIdx--;
                }
            }
        }
        System.out.println(Math.max(wCount, bCount));
    }
}