Join consecutive index of a list

Hello, this really seems simple but I am a little confused as to how to choose it, and I have seen that they can be joined if I have several lists but I would like to join consecutively from a single list, this is 2 by 2 or 3 by 3 …

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RESULTS
2 - 2 = 12 - 23 - 34 - 45 - 56 - 67 - 78 - 89 - 910
3 - 3 = 123 - 234 - 345 - 456 -567 -789 - 8910

@Christhian You can do something with the List.Sublists like this: Sublists.dyn (23.9 KB)

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thank you very much it works for me

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