Why am I getting an error when creating a set of characters from an array of characters?

[zinc field]

I’m doing an easy leetcode problem where I have to implement a function with a string input that contains distinct characters and a string array.

I’m supposed to output the number of elements in the array that only contains characters that belong to the string input. So I figured that sets would be ideal for such a problem.

However, when I’m trying to convert an array of characters into a set, it gives me this error.

[atomic schooner]

<@&987246883653156906> please have a look, thanks.

[atomic schooner]

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[quick horizon]

@zinc field can u post an actual screenshot, not a photo? those are quite unreadable

[zinc field]

Here @quick horizon

[zinc field]

I rearranged the code so that it fits the screen, which is why it says line 20 instead of line 14

[zinc field]

Nvm I solved it, turns out I couldn’t use Character, so I used String instead and used the split method