Imagine that you have a table Users with users first and last names and you are trying to create a column username where the first letter of the username is the first letter of the first name and the remaining letters in the username are the first 5 letters in the last name.

The original table Users

First_name	Last_name
Wolfgang	Mozart
Ludwing	Beethoven
Antonio	Vivaldi

Result

First_name	Last_name	username
Wolfgang	Mozart	wmozar
Ludwing	Beethoven	lbeeth
Antonio	Vivaldi	avival

Write the SQL query that returns the result table