let k = Int(readLine()!)!
let arr1 = ["N","U","P","C"]
let dic = ["N":2,"U":4,"P":3,"C":1]
var ansArr = [String]()

func kaito(_ p: Int, _ s: String){
    var S = s
    S += arr1[p]
    if p == 3{
        ansArr.append(S)
        ansArr.append(S+S)
    }else{
        let q = String(S.first!)
        if dic[q]! < dic[arr1[p+1]]!{
            kaito(p+1, S+S)
            kaito(p+1, S)
        }else{
            kaito(p+1, S)
            kaito(p+1, S+S)
        }
    }
}
kaito(0, "")
print(ansArr[k-1])