def update(player, direction):
    """Moves the player from its current position one step in the specified
    direction. Returns the players new position.

    Args:
        player (tuple): The player position
        direction (str): Either 'N', 'S', 'W', or 'E' representing the four
                         cardinal directions

    Returns:
        The new player position (tuple)

    """
    # your code for exercise (b)
    playerlist = list(player)
    if direction == "N":
        if playerlist[1] < 4:
            playerlist[1] += 1
    if direction == "E":
        if playerlist[0] < 4:
            playerlist[0] +=1
    if direction == "S":
        if playerlist[1] > 0:
            playerlist[1] -= 1
    if direction == "W":
        if playerlist[0] > 0:
            playerlist[0] -= 1
    return tuple(playerlist)