list.extend
Syntax
Extends a list by appending all entries in a to the end. a can be of any iterable type, but is most commonly another list.
The returned length will be as long as the sum of the lengths of l and each a that is supplied.
l - the list created from a sequence if values
a - the values use to create a list from. :…:\(.\)
list.create
list.find.index
9.1.13