The hybrid version of the positive keyboard is optimal

It is a PARALLEL positive keyboard with additional 10 common letters, the most commonly used. These letters (Т,П,З,Н,У,С,Л,К,Р,Д) are placed instead of the upper numbers. We did it pretty “mnemonically” – the letter З (ze) stands for the number 3. Here the similarity is about 100% – the letters Т and П are instead of

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