()

fun main() {
    val userInput = readLine()
    println(getEncodedString(userInput))
}

fun getEncodedString(input: String?): String {
    val charArray = input?.toCharArray()
    var encodedString = ""
    if(charArray != null) {
        for (i in charArray) {
            var iCount = 0
            for (k in charArray) {
                if(i.toLowerCase() == k.toLowerCase()) iCount++
                if(iCount > 1) {
                    encodedString += ")"
                    break
                }
            }
            if(iCount == 1) encodedString += "("
        }
    }
    return encodedString
}