What are the steps required to transform an E.164 number for ENUM resolution, including examples of character removal and digit reversal?

Remove non-numeric characters such as spaces, +, dashes, etc. (e.g., the number “+40 766-610060” should be transformed to “40766610060”). 

Reverse the digits and add a dot between every digit (e.g., 40766610060 becomes 0.6.0.0.1.6.6.6.7.0.4). 

Add the suffix domain e164.arpa (e.g., the transformed number becomes 0.6.0.0.1.6.6.6.7.0.4.e164.arpa).