def adjacentElementsProduct(inputArray):
    length = len(inputArray) - 1
    x = 0
    y = 1

    product = []
    while length >= y:
        firstIndex = inputArray[x]
        secondIndex = inputArray[y]
        product.append(firstIndex*secondIndex)
        x = x + 1
        y = y + 1
    return max(product)