Generator of number names for |-notation

On the left of | write a nonzero natural number; on the right of | write a string consisting of pairs of round brackets. Each pair can enclose other pairs. After each right bracket write a natural number. If some pair of brackets is not enclosed in any other then write zero after right bracket of this pair. For example 12|(()2()2)0. It corresponds to the expression 12|(()₂()₂)₀ of given notation.

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