Logic Puzzle - Alphabet splitting extraordinaire! sequel

Question

A group of Gobos is discussing how to divide the Scrabble tiles into two groups.
Here is what they suggested.

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1. ADFHJLMOQSUY; BCEGIKNPRTVWXZ
2. ABFKLMPVWY; CDEGHIJNOQRSTUXZ
3. AGIJKQXZ; BCDEFHLMNOPRSTUVWY_

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This is a sequel of this question.

Solve it.

Hint for Clue 1:

Even blind people can soIve it.

Answer 1

The first one is:

The first group is Braille letters with an odd number of dots in it.