Join two lists with the same size using smart value

[Priska Aprilia]

I have two list with the same size where I want to merge them and separate the each value of the two list using @.

list_1:

A,
A,
C,
D,
E

 list_2

one-time,
one-time,
recurring,
recurring,
recurring

The expected merged list_3:

A@one-time,
A@one-time,
C@recurring,
D@recurring,
E@recurring

I tried to look at the documentation https://support.atlassian.com/cloud-automation/docs/jira-smart-values-lists/ but was not able to find any idea how to achieve this.

Managed to get the idea on how to iterate a single list and add the suffix @index but no idea how to expand this function to merge two list.

{{#list_1.split(",")}}{{.}}@{{index}}{{^last}},{{/}}{{/}}

 I tried with 

{{#list_1.split(",")}}{{.}}@{{list_2.split(",").get(index)}}{{^last}},{{/}}{{/}}

and it did not work. It seems like the smart value does not recognize the index for the following function:

{{list_2.split(",").get(index)}}

Does anyone have any ideas?