/**
 * Given a starting position and an ending position,
 * this function determines the direction of movement.
 */
fun determineDirection(start: Int, end: Int): String? {

    if (end > start) {
        return null
    }
    // Add logic for determining direction when end <= start
    return null
}
/**
 * Given a starting position and an ending position,
 * this function determines the direction of movement.
 */
fun determineDirection(start: Int, end: Int): String? {
/**
 * Given a starting position and an ending position,
 * this function determines the direction of movement.
 */
fun determineDirection(start: Int, end: Int): String? {

    if (end > start) {
        return null
    }
    // Add logic for determining direction when end <= start
    return null
}