CSV to list

[Rivia Maribel Patzi Ulo]

I want to put a CSV file into a list that joins three lines at the same time. I don´t know how can I show three lines of my file without using more than one vision list.

[ABG]

You want to turn the list

A,B,C,D,E,F,G,H,I,J,K,L

into the list

A\nB\nC,D\nE\nF,G\nH\nI,J\nK\nL

?

Give us an example.

ABG