fun main(args: Array<String>) {
    val str = readLine()?.orEmpty()
    var result = "No"
    val sLength = str!!.length

    val strLeft = str.substring(0,((sLength - 1) / 2))
    val strRight = str.substring(((sLength + 1) / 2),sLength)

    if(judgeGram(str) && judgeGram(strLeft) && judgeGram(strRight)){
        result = "Yes"
    }

    
    println(result)
}

fun judgeGram(s:String):Boolean{
    var result = false
    val sLength = s.length

    var sLeft = ""
    var sRight = ""

    if(sLength % 2 == 0){
        sLeft = s.substring(0,sLength  / 2)
        sRight = s.substring(sLength / 2,sLength)

    }else{
        sLeft = s.substring(0,((sLength - 1) / 2))
        sRight = s.substring(((sLength + 1) / 2),sLength)
    }

    val sRR = sRight.reversed()
    if(sLeft == sRR){
        result = true
    }
    return result
}