Counting cards using switch

Trying to implement this idea of mine using switch but seems its not working as it is inteded

let count = 0;

function cc(card) {
// Only change code below this line
switch (card){
 case 2:
 case 3:
 case 4:
 case 5:
 case 6:
 count += 1, "Bet";
 break;
 case 7:
 case 8:
 case 9:
 case 10:
 case 'J':
 case 'Q':
 case 'K':
 case 'A':
 count -= 1, "Hold";
}
return "Change Me";
// Only change code above this line
}

cc(2); cc(3); cc(7); cc('K'); cc('A');

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Challenge: Counting Cards

Link to the challenge:

What is it you believe this line of code is doing?

count += 1, "Bet";

This is all the function returns, which isn’t what is asked for.

return "Change Me";