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There must be brackets after the nickname, which indicate sequentially the color, castle, starting hero, final hero for each player. That is, there must be two pairs of brackets - no more and no less. Brackets are key elements for the program that it relies on. Only 2 pairs.
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By the final hero, do they mean a participant in the FB? In that case, sometimes the first scout hero you come across participates, and there can also be more than one of them.