843. Guess the Word

    func findSecretWord(_ wordlist: [String], _ master: Master) {
        var strS = Set(wordlist)
        while strS.count > 0{
            let str = strS.randomElement()!
            let n = master.guess(str)
            if n == 6 { return }
            for w in strS{
                if !match( w, str, n){
                    strS.remove(w)
                }
            }
        }
    }

    func match(_ str: String, _ tar: String, _ k : Int) -> Bool{
        var p = 0
        var count = 0
        let arr1 = Array(str)
        let arr2 = Array(tar)
        while p < arr1.count{
            if arr1[p] == arr2[p] {
                count += 1
                if count > k { return false}
            }
            p += 1
        }
        return count ==  k
    }