You are working on a video game where the player has to go through a level without falling into any obstacles. The player starts at position zero and can move in three ways: - L (left) => one position to the left - R (right) => one position to the right - J (jump) => move two positions, in the direction of the previous move The player starts at position 0 and the exit will always be at position 10. The instructions never lead the player outside the level boundaries, and the first move is always right. Write a function that given the instructions and the positions of the obstacles, returns True if the instructions lead to the exit position, and False otherwise.