counting Cards Bug

Challenge [Counting Cards](https://freecodecamp.cn/challenges/counting-cards#?solution=var%20count%20%3D%200%3B%0A%0Afunction%20cc(card)%20%7B%0A%20%20%2F%2F%20%E8%AF%B7%E6%8A%8A%E4%BD%A0%E7%9A%84%E4%BB%A3%E7%A0%81%E5%86%99%E5%9C%A8%E8%BF%99%E6%9D%A1%E6%B3%A8%E9%87%8A%E4%BB%A5%E4%B8%8B%0A%20%20%0A%20%20if%20(card%3D%3D2%7C%7Ccard%3D%3D3%7C%7Ccard%3D%3D4%7C%7Ccard%3D%3D5%7C%7Ccard%3D%3D6)%7B%0A%20%20%20%20count%2B%2B%3B%0A%20%20%7Delse%20if(card%3D%3D10%7C%7Ccard%3D%3D'J'%7C%7Ccard%3D%3D'Q'%7C%7Ccard%3D%3D'K'%7C%7Ccard%3D%3D'A')%7B%0A%20%20%20%20return%20count--%3B%0A%20%20%7D%0A%20%20%0A%20%20if%20(count%3E0)%20%7B%0A%20%20%20%20return%20count%2B%22%20Bet%22%3B%0A%20%20%7Delse%20%7B%0A%20%20%20%20return%20count%2B%22%20Hold%22%3B%0A%20%20%7D%0A%20%20%0A%20%20%2F%2F%20%E8%AF%B7%E6%8A%8A%E4%BD%A0%E7%9A%84%E4%BB%A3%E7%A0%81%E5%86%99%E5%9C%A8%E8%BF%99%E6%9D%A1%E6%B3%A8%E9%87%8A%E4%BB%A5%E4%B8%8A%0A%7D%0A%0A%2F%2F%20%E4%BD%A0%E5%8F%AF%E4%BB%A5%E5%9C%A8%E8%BF%99%E9%87%8C%E6%B7%BB%E5%8A%A0%2F%E5%88%A0%E9%99%A4%20cc%20%E6%96%B9%E6%B3%95%E7%9A%84%E8%B0%83%E7%94%A8%E6%9D%A5%E6%B5%8B%E8%AF%95%E7%BB%93%E6%9E%9C%0A%2F%2F%20%E6%8F%90%E7%A4%BA%3A%20%E5%B7%A6%E8%BE%B9%E5%8F%AA%E4%BC%9A%E6%98%BE%E7%A4%BA%E6%9C%80%E5%90%8E%E4%B8%80%E6%AC%A1%E6%89%A7%E8%A1%8C%E7%9A%84%E8%BF%94%E5%9B%9E%E5%80%BC%0Acc(7)%3B%20cc(8)%3B%20cc(9)%3B%20cc(2)%3B%20cc('A')%3B%0A%0A) has an issue.
User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36.
Please describe how to reproduce this issue, and include links to screenshots if possible.

My code:
```javascript
var count = 0;

function cc(card) {
// 请把你的代码写在这条注释以下

if (card==2||card==3||card==4||card==5||card==6){
count++;
}else if(card==10||card=='J'||card=='Q'||card=='K'||card=='A'){
return count--;
}

if (count>0) {
return count+" Bet";
}else {
return count+" Hold";
}

// 请把你的代码写在这条注释以上
}

// 你可以在这里添加/删除 cc 方法的调用来测试结果
// 提示: 左边只会显示最后一次执行的返回值
cc(7); cc(8); cc(9); cc(2); cc('A');

```

the last cc() can't write 10 or 'J' or 'Q' or 'K' or'A',it does't change the value, others can be executed normally