String Letter Search :
Difficulty Level : Easy
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You are given a string $$$s$$$ and a character $$$x$$$. Return the maximum distance between any two occurences of $$$x$$$ in the string $$$y$$$. The distance between $$$2$$$ occurences of a character is defined as the total number of distinct characters between them excluding white spaces and the character itself. Output $$$-1$$$ if the $$$x$$$ doesn't exist in the string $$$s$$$ or occurs only once.
The string $$$s$$$ consists only of lowercase latin letters and white spaces.
The first line contains a string $$$s(1 \leq |s| \leq 10^6)$$$.
The second line contains a character $$$x$$$. It is guaranteed that $$$x$$$ is a lowercase latin letter.
Output a single integer - the max distance between $$$2$$$ occurences of $$$x$$$ or $$$-1$$$ if it is not possible.
my name is granar a
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