Identifying Permutations of 12 rows of data across 3 columns

I have a list of 12 initials and i need all the possible permutations across 3 columns

Example of my data:
LS
RL
JS
NS
LF
TW
MG
SH
BK
JP
JH
JB

What i need:

Basically all the unique combinations across 3 columns for each set of initials (see attached)

You can use Power Query (Get & Transform Data). Format your Initials data as a table, then use:

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Just for fun, here's a VBA approach, too:

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