14. Initially, there are 47 playing cards stacked together, and the operation is performed from top to bottom: discard the first and second cards, then place the third card at the bottom; discard the fourth and fifth cards, then place the sixth card at the bottom; discard the seventh and eighth cards, then place the ninth card at the bottom……until only one card remains, this card was initially the $\qquad$th card from the top.
$30$