Tools pane customization (DC) question

Hi,

At Tools Customization (DC) , it says:

Add entries with a key and tool name under cDisabled to remove tools. For example:

HKLM\SOFTWARE\WOW6432Node\Policies\Adobe\(productname)\(version)\FeatureLockDown\cAcroApp\cDisabled] "a0"="CreatePDFApp" "a1"="CommentApp" "a2"="PagesApp"

What the "a0"="CreatePDFApp" means?

Does it mean to create a Key named a0 under cDisabled on the left and then move to the right to set Name: Default's Data to CreatePDFApp?

Or does it mean under cDisabled, go to the right, right click, choose New/String Value, set Name to a0 and Data to CreatePDFApp?

Thank you for help.

John