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Not the correct number of Fridays between 2014 and 2016 - Expected: 4, instead got: 5
I count 5 (Jan, Feb, Oct 2014, July 2015, Sept 2016)
Also Not the correct number of Fridays between 1997 and 1998 - Expected: 3, instead got: 4
Same (Jan, Feb, Oct 1997, July 1998)
The function you write for this challenge is the inverse of this kata: "Next bigger number with the same digits."
Maybe this needs to be removed as the tests on this kata do not allow for the same approach