Solution
The code language uses the letter + 2 to start and the letter + 3 in the second place, letter + 2 in the third spot and the letter +2 in the third from last spot and the letter + 3 in the last but one spot and the letter + 2 in the last place.
So, it is +2 +3 + 2 ...... +2 +3 +2
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