public static void main(String args[]){
int a[]={1,5,6,9,8};
Scanner scan = new Scanner(System.in);
int b = scan.nextInt();
int i = 0;
for(;i<a.length;i++){
if(b == a[i]){
System.out.println("第"+i+"位");
break;
}
}
if(i == a.length){
System.out.println("不存在");
}
}