Hangman the series kata (https://forums.bigbears.io/t/hangman-the-series-basic-function/368)

basic_hangman.kt

fun hangman(secretWord: String, letters: List<Char>): Boolean {
    val remaingChars = secretWord.toCharArray().toMutableList()
    var score = 7
    var i = 0
    while (remaingChars.size > 0 && i < letters.size && score > 0) {
        if (!remaingChars.remove(letters[i])) score--
        i++
    }
    return score > 0
}