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06:38
@Juraj Comments under questions are not for answering the question. For one thing, this means the "answer" cannot be voted up or down. Also the Stack Exchange engine will consider the question to be unanswered and continue to bump the question from time to time. Also the OP cannot accept a comment. By all means improve the question by formatting it, but answers should be in the answer box.
And look on the bright side, with luck you'll get rep from giving an answer and having it accepted and/or voted up.
 
4 hours later…
10:18
it was just a hint, not an answer. I have no time now to write a full answer.

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