Problem: Now you get Baby Ehab's first words: "Given an integer n, find the longest subsequence of [1,2, …, n-1] whose product is 1 modulo n." Please solve the problem.

A sequence b is a subsequence of an array a if b can be obtained from a by deleting some (possibly all) elements. The product of an empty subsequence is equal to 1.

Input

The only line contains the integer n (2 ≤ n ≤ 10^5).

Output

The first line should contain a single integer, the length of the longest subsequence.

The second line should contain the elements of the subsequence, in increasing order.

If there are multiple solutions, you can print any.

Examples

Input


5


Output


3
1 2 3 

Input


8


Output


4
1 3 5 7 

Note

In the first example, the product of the elements is 6 which is congruent to 1 modulo 5. The only longer subsequence is [1,2,3,4]. Its product is 24 which is congruent to 4 modulo 5. Hence, the answer is [1,2,3].

Solution (in JAVA):

Solution:
/*
    JAI MATA DI
 */

import java.util.*;

//import javax.print.attribute.HashAttributeSet;

import java.io.*;
import java.math.BigInteger;
import java.sql.Array;

public class CP {
	  static class FR{
			BufferedReader br;
			StringTokenizer st;
			public FR() {
				br = new BufferedReader(new InputStreamReader(System.in));
			}
			String next() 
		    { 
		        while (st == null || !st.hasMoreElements()) 
		        { 
		            try
		            { 
		                st = new StringTokenizer(br.readLine()); 
		            } 
		            catch (IOException  e) 
		            { 
		                e.printStackTrace(); 
		            } 
		        } 
		        return st.nextToken(); 
		    } 

		    int nextInt() 
		    { 
		        return Integer.parseInt(next()); 
		    } 

		    long nextLong() 
		    { 
		        return Long.parseLong(next()); 
		    } 

		    double nextDouble() 
		    { 
		        return Double.parseDouble(next()); 
		    } 

		    String nextLine() 
		    { 
		        String str = ""; 
		        try
		        { 
		            str = br.readLine(); 
		        } 
		        catch (IOException e) 
		        { 
		            e.printStackTrace(); 
		        } 
		        return str; 
		    } 
		}
	 static int mod  = 1000000007;
	 static long gcd(long a, long b)
	  {      
	     if (b == 0)
	        return a;
	     return gcd(b, a % b); 
	  }
	 static boolean[] prime(int num) {
			boolean[] bool = new boolean[num];
		     
		      for (int i = 0; i< bool.length; i++) {
		         bool[i] = true;
		      }
		      for (int i = 2; i< Math.sqrt(num); i++) {
		         if(bool[i] == true) {
		            for(int j = (i*i); j<num; j = j+i) {
		               bool[j] = false;
		            }
		         }
		      }
		      if(num >= 0) {
		    	  bool[0] = false;
		    	  bool[1] = false;
		      }
		      
		      return bool;
		}
	 static class Pair implements Comparable<Pair>{
		 	int x;
	 		int y;
	 		Pair(int key , int value){
	 			this.x = key;
	 			this.y = value;
	 		}
			@Override
			public int compareTo(Pair o) {
				return this.x - o.x;
			}
//			@Override
//			public int hashCode(){
//				return val + ind;
//			}
	 	}
	 	
	
	 public static void main(String args[]) {
		 FR sc = new FR();
		 int n = sc.nextInt();
		ArrayList<Long> al = new ArrayList<>();
		long prod = 1;
		for(int i = 1; i <n-1 ; i++) {
			if(gcd(i, n) == 1) {
				prod *= i;
				prod %= n;
				al.add((long)i);
			}
			
		}
		if(prod*(n-1)%n == 1) al.add((long)n-1);
		StringBuilder sb = new StringBuilder();
		for(long e:al) sb.append(e+" ");
		System.out.println(al.size());
		 System.out.println(sb);
	 }
	
}