How can I loop over a map of String List (with an iterator) and load another String List with the values of InputArray?

How can I iterate over a InputArray and load another input array with the same values except in lower case (I know that there is a string to lower function)?

Question: How to iterate over a String List with a LOOP structure?

InputArray: A, B, C

OutputArray should be: a, b, c

In case, you want to retain the inputArray as such and save the lowercase values in an outputArray, then follow steps in below image which is self explanatory:

In the loop Step, Input Array should be /inputArray and Output Array should be /outputArray.