“func isPossible(word: String) -> Bool { var tempWord = rootWord

for letter in word {
    if let pos = tempWord.firstIndex(of: letter) {
        tempWord.remove(at: pos)
    } else {
        return false
    }
}

return true”

This function is not working

i tried printing the pos & each letter when i enter a word which does not have letters as root word it print some number as pos.

pls check

    func isPossible(word: String) -> Bool {

        var tempWord = rootWord

        for letter in word {
            if let pos = tempWord.firstIndex(of: letter) {
                tempWord.remove(at: pos)
            } else {
                return false
            }
        }
        return true
    }

Your function seems to be correct. Could you elaborate on what is not working? what is going wrong?