freeCodeCamp - BlackJack demonstration - Can this be more DRY?

blackJack.js

var count = 0;

function cc(card) {
  // Only change code below this line
  if (card == 1 || card == 2 || card == 3 || card == 4  || card == 5 || card == 6) {
    count++;
  } else if (card == 7 || card == 8 || card == 9) {
    count = count;
  } else if (card == 10 || card == 'J'|| card == 'Q' || card == 'K' || card == 'A') {
    count--;
  }


  if (count > 0) {
  return count + " Bet";
  } else {
    return count + " Hold";
  }
  
  // Only change code above this line
}

// Add/remove calls to test your function.
// Note: Only the last will display
cc(2); cc(3); cc(7); cc('K'); cc('A');