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  • $\begingroup$ This is correct. However, I have a different solution which I believed was unique. In it Freddy is younger (which in fact he is!). $\endgroup$ Commented Feb 23, 2020 at 16:34
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    $\begingroup$ @Bernardo Interesting. I'm still in the process of checking the remaining possibilities, but I'd assumed that this solution would be unique and everything else would be excludable somehow. $\endgroup$ Commented Feb 23, 2020 at 16:35
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    $\begingroup$ @Bernardo OK, got it. There are exactly two solutions, nothing else works. $\endgroup$ Commented Feb 23, 2020 at 16:55