[Solved] Regex accepting one invalid character when im trying to prevent ‘Space’ at the end of input by using ‘S’ symbol

Agnibha Asks: Regex accepting one invalid character when im trying to prevent ‘Space’ at the end of input by using ‘S’ symbol
my requirement: Must be between 3 and 40 characters consisting of alphabet, numeric and allowed special characters: hyphen( -), forward slash ( /), period(.), pound (#) and space( ). Cannot begin or end with a space.

my Regex:^S[a-zA-Z0-9./#, -]{1,58}S$

Using my regex, one invalid character is gettig accepted at the end.


Check the output here

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