const BKRT = "\n";
const SPAC = " ";
const NOSP = "";

function Main(input){
	input = [].concat(...input.split(BKRT).map(a=>a.split(SPAC)));
  const strShift = ()=>input.shift();
  const intShift = ()=>~~input.shift();
  
  var obj = {};
  
  var r = intShift();
  
  for(var i = 0; i < r; i++){
  	var hoge = strShift();
  	obj.hasOwnProperty(hoge)?obj[hoge]++:obj[hoge]=1;
  }
  
  var b = intShift();
  
  for(var i = 0; i < b; i++){
  	var hoge = strShift();
    obj.hasOwnProperty(hoge)?obj[hoge]--:obj[hoge]=-1;
  }
  
  var o = [0];
  for(var i in obj){
  	o.push(obj[i]);
  }
  return ~~Math.max(...o);
}

// If you are interested in the algorithms I used, 
// there is no need to read down from this line.

((b,c,d)=>"undefined"!=typeof require?console.log(Main(require("fs").readFileSync("/dev/stdin","utf8"))):[b=b.split("\n").slice(1,-1).join("\n"),c=function(){try{return Main(b)}catch(f){return f.stack||f.message}}(),d=typeof c,"string"==d||(c=JSON.stringify(c)),$("<form>").append([[10,b],0,[1,d],0,[10,c]].map(f=>$(f?"<textarea>":"<br>",f&&{rows:f[0],cols:40,text:f[1]}))).appendTo("body")])(`
3
apple
orange
apple
1
grape
`);