Determine the atomic numbers, mass numbers, and chemical symbols of the nuclei, which are obtained if, in 2He3, 4Be7, 8O15 nuclei, protons are replaced by neutrons, and neutrons by protons. Give a symbolic record of the resulting nuclei.

Detailed solution with a brief record of the conditions, formulas and laws used in the decision, the conclusion of the calculation formula and the answer.
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