import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Deque;
import java.util.HashMap;
import java.util.InputMismatchException;
import java.util.Map;
import java.util.PriorityQueue;
import java.util.StringTokenizer;
import java.math.BigInteger;
    
public class Main{

static final InputStream in=System.in;
static final PrintWriter out=new PrintWriter(System.out);
static final int INF=Integer.MAX_VALUE/2;
static final long LINF=Long.MAX_VALUE/2;
    
public static void main(String[] args) throws IOException{
InputReader ir=new InputReader(in);
int nw=ir.nextInt();
int res,insertionIndex;
int[] w=ir.toIntArray(nw);
int nb=ir.nextInt();
int[] b=ir.toIntArray(nb);
Arrays.sort(w);
Arrays.sort(b);
int ans1,ans2;
ans1=ans2=1;
int prev=w[nw-1];
while(true){
res=Arrays.binarySearch(b,prev);
insertionIndex=(res>=0)?res:~res;
if(insertionIndex==0||b[0]==b[insertionIndex]) break;
prev=b[insertionIndex-1];
ans1++;
res=Arrays.binarySearch(w,prev);
insertionIndex=(res>=0)?res:~res;
if(insertionIndex==0||w[0]==w[insertionIndex]) break;
prev=w[insertionIndex-1];
ans1++;
}
prev=b[nb-1];
while(true){
res=Arrays.binarySearch(w,prev);
insertionIndex=(res>=0)?res:~res;
if(insertionIndex==0||w[0]==w[insertionIndex]) break;
prev=w[insertionIndex-1];
ans2++;
res=Arrays.binarySearch(b,prev);
insertionIndex=(res>=0)?res:~res;
if(insertionIndex==0||b[0]==b[insertionIndex]) break;
prev=b[insertionIndex-1];
ans2++;
}
out.println(Math.max(ans1,ans2));
out.flush();
}

static class InputReader {
private InputStream in;
private byte[] buffer=new byte[1024];
private int curbuf;
private int lenbuf;

public InputReader(InputStream in) {this.in=in;}
  
public int readByte() {
if(lenbuf==-1) throw new InputMismatchException();
if(curbuf>=lenbuf){
curbuf= 0;
try{
lenbuf=in.read(buffer);
}
catch (IOException e) {
throw new InputMismatchException();
}
if(lenbuf<=0)
return -1;
}
return buffer[curbuf++];
}

public boolean isSpaceChar(int c){return !(c>=33&&c<=126);}

private int skip() {int b; while((b = readByte())!=-1&&isSpaceChar(b)); return b;}

public String next() {
int b=skip();
StringBuilder sb=new StringBuilder();
while(!isSpaceChar(b)){
sb.appendCodePoint(b);
b=readByte();
}
return sb.toString();
}
 
public int nextInt() {
int c=readByte();
while (isSpaceChar(c)) c=readByte();
boolean minus=false;
if (c=='-') {
minus=true;
c=readByte();
}
int res=0;
do{
if(c<'0'||c>'9') throw new InputMismatchException();
res=res*10+c-'0';
c=readByte();
}while(!isSpaceChar(c));
return (minus)?-res:res;
}

public long nextLong() {
int c=readByte();
while (isSpaceChar(c)) c=readByte();
boolean minus=false;
if (c=='-') {
minus=true;
c=readByte();
}
long res = 0;
do{
if(c<'0'||c>'9') throw new InputMismatchException();
res=res*10+c-'0';
c=readByte();
}while(!isSpaceChar(c));
return (minus)?-res:res;
}

public int[] toIntArray(int n){
int[] a=new int[n];
for(int i=0;i<n;i++) a[i]=nextInt();
return a;
}
}
}