Running Man — Season 1, Episode 678

In this week's episode, a hide-and-seek game worth 1,000 dollars begins. The members have to find the hidden prize envelope with 1,000 dollars. The person whose name is written last on the prize envelope gets the prize money. However, there's a hidden rule that will determine two members who will get the penalty of the day. Who will be able to protect the prize until the end?