Assume that the user input for product code is not sorted alphabetically. Initialise the following program data in main method (that is, these variables are not global variables):

The stock level for each part is 100 at the start of the application. startLevel = 100

The reorder point for each part is 20. Once the stock level is 20 or below, the part should be reordered. reorderPoint = 20

A string records the letters A L. One letter is used to identify a part in the factory. partIds = 'ABCDEFGHIJKL'

An un-nested list records the stock level of each part. The stock level for each part starts with the value recorded in startLevel. For example, stock level for part A should be recorded at the 0-index, stock level for part B should be recorded at the 1-index, etc.

Have to use another un-nested list to store existing product codes and start the list empty.