We need to calculate the total number of yards as:
- 12 + 5 - 8 + 14 = -1
Because the tigers lose 12 yards, gains 5 yards, loses 8 yards, and gains 14 yards.
So, after the 4th plays, the Tigers lose 1 yard and didn't keep the possession of the ball.
Answer: the tigers didn't maintain the possession of the ball.